As the curtains draw close on I, Jack Wright, Sally Wright (played by Nikki Amuka-Bird) asserts her calm demeanor, professing that she felt no trepidation and viewed the situation as one where she had nothing left to forfeit. She emphasizes the tale's moral—a cautionary note against placing trust in anyone. In the courtroom, Laura Johnstone (Rakhee Thakrar) speaks, grappling with the intricate challenge of deciphering the thoughts of a deceased individual. Max Preston (James Wilby) delves into the legal responsibilities tied to fatherhood, accusing Jack Wright of neglecting his statutory duties. Ruth Alleyn (Rebekah Hinds) contributes her insights on Gray Wright (John Simm), while DCI Hector Morgan (Harry Lloyd) announces that the evidence uncovered at Reuben Maguire's residence has undergone scrutiny, yet insufficient for prosecution. Hector ponders the rationale behind Reuben's attempt to concoct a false alibi for the fateful night, while Arnaud Tissier remains unresponsive to their calls.
DC Kat Jones (Liz Kingsman) informs Hector of Gray's recent hospitalization, around a month prior, with John Wright (Daniel Rigby) mentioning a debt settlement as the cause, which they deemed resolved. Hector expresses a desire to scrutinize John's financial records. Meanwhile, Georgia Wright (Zoe Tapper) was spotted speeding near Jack's residence on the night in question, with Mary Robbins (Victoria Brom), Jack's housekeeper, as her passenger.
In the court's hallowed halls, Emily Wright (Ruby Ashbourne Serkis) discusses her thriving enterprise. Gray opens up about his struggles with addiction, tracing its origins to the aftermath of his parents' divorce, a period marked by his father's intimacy with a new partner in Gray's bedroom. On Christmas Day, Gray partook in dinner with the groundsman and his son, Ray, who offered him a joint—an evening he vividly recalls. Amidst this, John seeks a swift assessment of his investment portfolio, only to be informed by an advisor (Carlyss Peer) of dwindling funds, despite his denial of recent withdrawals.
In court, Laura presses Gray on his addiction and the substantial sums his father bestowed upon him over the years, presenting evidence of bank transfers totaling £326,000. She probes him about the fate of £500 Jack gave him to bury as Emily's 10th birthday gift. The spotlight then shifts to Sally, confronted with the prenuptial agreement's clauses detailing infidelity and its impact on her inheritance. Laura confronts her on whether she violated those terms, to which Sally counters by accusing Jack of repeated breaches. Laura reveals that Sally had confidentially shared with Emily, on a night out, doubts about Joshua's paternity. Outside the courthouse, Sally lambasts Emily for her actions, while Gray chastises her for stooping so low, reminding her that she squandered the money on drugs.
Rose, portrayed by Gemma Jones, reassures Emily that all is well. Hector confronts Mary about her presence in the car with Georgia, to which she confirms her involvement. He reveals that the photograph was captured shortly before Jack's shooting. Mary explains they were en route to retrieve her vehicle after dining out. Georgia’s reaction was far from pleased, abruptly ending their night and driving Mary back to fetch her car. Mary attests she had never witnessed Georgia in such a desperate state, acknowledging the possibility that Georgia could have parked elsewhere and remained at the location after her departure.
Rose receives a call from Cheryl's mother amidst the unfolding drama. Kat presents Hector with Gray's bank statements, revealing his whereabouts at a pub seven miles from Jack's residence on the night of the tragedy. Bobby, accompanied by Rose, visits the hospital where Rose is eager to see Cheryl. She confesses to Bobby that she has already transferred the funds, contrary to his belief that they should await the court's ruling.
Later that night, Georgia confesses her gambling addiction to John, lamenting that they both married the wrong partners. John expresses regret for not living up to his father's example, while Georgia admits to losing their investment portfolios and mortgaging their house to its limits.
The following morning, Josh Wright, played by Samuel Small, voices his discontent to Sally about the public exposure of their private matters. Sally reassures him that she will rectify the situation. Kat and Hector scrutinize Arnaud's movements, discovering he could have reached Jack's house via a private helicopter.
Moments later, Gray undergoes interrogation. Hector directly accuses him of murdering his father, probing into a particular payment. He speculates that Gray consumed some wine before approaching Jack to request money to settle his debt with Eddie Elliot. Gray concedes his intention to visit Jack but crashed his car en route, prompting him to flee the scene in panic and return to London by train. He admits to jumping the train barrier to avoid payment. Upon Gray's departure, Kat informs Hector that the car is indeed where Gray claimed, with a wreckage matching his description. However, they are unable to procure footage that clears Georgia Wright.
Gray learns of the court’s judgment in the case. Hector receives a call from Beth, announcing her return to the UK and her desire to regain custody of their children. John informs Georgia of his plans to travel to London, telling her she can keep everything as he never cherished it anyway. The judge remains silent on the prenuptial agreement, seeking an independent analysis to verify Jack's non-paternity of Josh. Sally's claim is rejected. Arnaud Tissier, played by Jalil Lespert, observes the proceedings from afar.
Lab results on the bloodstains found on Reuben's clothes arrive, prompting Kat and Hector to examine them meticulously. Meanwhile, John contacts Leslie, instructing her to transfer 1.57 million to a new account.
The judge rules in favor of John and Gray, leaving Emily enraged. She storms out of the courtroom, with Gray hastily following to express his sincere apologies. He insists that whatever he received, Emily could have it, emphasizing that their motive was always centered around justice for Jack. However, Emily's freedom is abruptly shattered as Kat arrests her for murder, with Reuben also being taken into custody shortly after.
During a rigorous interrogation, Reuben remains tight-lipped, refusing to utter a single word in response to any inquiry. Hector, sensing an opportunity for Reuben to clear his name, urges him to speak out. Kat, trying a different angle, accuses Reuben of committing the crime for Emily's sake, but still, he remains silent. Kat then confronts Emily with the revelation that Kyle had shown them her incriminating messages, probing into her cryptic remark about Jack deserving everything and more. Hector reads aloud the message detailing Jack's heinous actions towards Emily. DCI Morgan proposes a theory, suggesting that Emily orchestrated Jack's demise to alter the will in her favor, growing impatient with his lingering presence. He claims that Jack's blood was found on the burnt remnants of a pair of jeans and a T-shirt discovered in Reuben's house. Emily reluctantly admits the clothing belongs to her.
Upon returning, Gray finds a note of apology from John. Emily then confides in Gray, revealing that Jack had inappropriately touched her when she was just 13, believing she was asleep. Despite her initial efforts to suppress the incident, Emily knew she had to ensure her safety. Consequently, she avoided unnecessary interactions with Jack until ten years later, when she sought acknowledgment for his actions. Emily asserts that Jack attempted to attack and degrade her, leading to a scuffle where she accidentally elbowed him, staining her clothes with his blood. She explains that she sought refuge at Reuben's place to change, but she has no idea why he kept her bloodstained clothes. Emily firmly maintains that Reuben did not murder Jack.
In a private discussion, Hector and Kat deliberate on Emily's assertions. Hector agrees to involve the Child Protective Services (CPS). That evening, Sally encounters Arnaud in her home, and their conversation veers between the case and Arnaud's finances. He advises her to liquidate her assets and warns her before departing. Subsequently, Hector announces murder charges for Reuben and solicitation charges for Emily. Arnaud gives Sally a 48-hour ultimatum.
The judge grants Emily ownership of the company shares, while John exits hastily in a taxi. Emily's monetary reward is reduced to 5.4 million pounds, which she distributes to John and Gray, giving each 5 million pounds. Rose's share is drastically cut to 100,000 pounds. Cheryl informs Rose that they have arrived at the treatment center, and Bobby breaks the news of Emily's arrest. As Emily faces her charges, she insists on her innocence. Sally, from within the confines of her cell, reflects that the will mirrored life's cruelty and opacity. She acknowledges that Emily shares her ruthless nature, seeing a reflection of herself in Emily's eyes. Sally confesses to her own guilt, having also taken a life, recognizing her own lack of innocence.
