Season 2, Episode 1 of "Based on a True Story" opens with Ava and Nathan grappling with the complexities of parenthood. Ava, particularly, is under immense stress due to her insufficient breast milk supply, despite having exhausted all possible remedies. Seeking professional guidance, they consult an expert who delves into Ava's birth narrative, revealing a harrowing tale. Three months prior, their tranquility was shattered when Simon unexpectedly walked in on them amidst a messy scene of cleaning up blood. In a bizarre twist, Ava's feigned labor to deceive Simon turned out to be real, prompting them to hastily summon Matt to dispose of the body.
After the expert's departure, tensions escalate between Ava and Nathan over the prospect of introducing formula feeding. Nathan believes it could alleviate their struggles, while Ava staunchly opposes the idea. He storms out to coach Jaden but encounters further friction when his mother criticizes his parking habits. Back at home, Ava turns to the Boobie Bev podcast for breastfeeding advice, only to revisit the formula debate upon Nathan's return. Ava confesses her fear of mirroring her selfish mother's traits, while Nathan endeavors to reassure her.
Their conversation is interrupted by a text from Matt, which Ava notices reveals that her sister Tory, far from attending law school, is actually in Mexico with Matt. Panic-stricken, Ava dispatches Nathan to retrieve Tory. Before departing, Nathan urges Ava to reconnect with her friends as part of their disguise. Ava heeds his advice but later regrets her decision, experiencing haunting hallucinations on her way home. She engages in surreal conversations with Ruby's ghost, who claims Ava's guilt is impeding her milk production.
Meanwhile, in Mexico, Nathan discovers Matt in a luxurious rehabilitation center, where Matt claims to have undergone a transformation. Now healed from his malady, Matt locates Tory, who defends him, asserting his genuine change and dedication to not harming anyone. She challenges Nathan and Ava's morality, reminding them of their own exploitation of Matt's condition for personal gain. Nathan pleads with Tory to reconsider her path and return to law school.
Joining Matt in a bonding session, Nathan experiences a profound awakening, cultivating an alpha male mindset that draws him closer to Matt. Matt vows to Tory that he loves her and will refrain from harming anyone. He promises not to impede Tory's future, cementing a newfound sense of trust and camaraderie between him and Nathan.
Back at her home, Ava is haunted by guilt-ridden hallucinations and resolves to reconcile with Simon. Currently out on bail but confined to house arrest, Simon finds Ava at his doorstep. As their conversation unfolds, Ava receives a message from Nathan, revealing a shocking truth: Matt did not murder Ruby; it was Simon, acting impulsively in a fit of rage, who committed the crime, while Matt silently witnessed the entire grim scene. Subsequently, Simon embarked on a solitary drive to ponder his next actions, unaware that Matt had stealthily taken Ruby's body away. Nathan likens the entire sequence of events to a real-life "Shawshank Redemption." Realizing that Ava has suspicions about him, Simon confesses his guilt. In a calculated move, Ava deliberately spills breast milk onto his ankle monitor, triggering an alarm and creating an opportunity for them both to flee.
Meanwhile, Nathan returns home after fostering a deeper bond with Matt and having a heartfelt talk with Tory. The next morning, Ava awakens refreshed and in high spirits, having enjoyed a restful night's sleep followed by an invigorating shower. Her spirits are further lifted by the prospect of Tory's return, which she assumes is to pursue her legal studies. However, Tory arrives with Matt in tow, announcing to everyone's astonishment that they are engaged.
