Episode 7 of "Perfect Family" unfolds with a jarring turn as Jin-hyeok is abruptly apprehended by the police, accused of Soo-yeon's abduction. With a heavy heart, he entrusts Eun-joo with the care of Sun-hui as he's escorted to the precinct. Elsewhere, Dong-ho's superior praises him for securing the crucial evidence leading to Jin-hyeok's arrest, while Sun-hui remains at home, wracked with guilt over her husband's predicament.
A haunting flashback resurfaces, showing Sun-hui's desperate phone call to Hyun-min, confessing Jin-hyeok's involvement in Soo-yeon's mysterious disappearance. That dreary evening, Eun-joo ventures out into the relentless downpour, while Sun-hui's sorrowful sobs echo through the bedroom.
Hyun-woo, driven by an urgent need to confront Soo-yeon, calls her and arranges a clandestine meeting in a secluded alley. But just as he prepares to embark on his quest, Sung-woo intercepts him, steering him instead to a cozy café where he divulges the shocking truth: Soo-yeon is no longer among the living. Hyun-woo, unconvinced, persists in his search, only to be brutally ambushed by a figure cloaked in a black raincoat. Sung-woo, quick to react, rushes the wounded Hyun-woo to safety at the hospital.
Meanwhile, Dong-ho's interrogation of Jin-hyeok hits a stalemate. The lawyer insists his innocence, claiming that both his personal vehicle and the van used in the near-fatal attack on Sun-hui outside her school were stolen on the fateful night of Soo-yeon's vanishing. Jin-hyeok boldly challenges Dong-ho, demanding proof and castigating the police for their questionable methods in acquiring traces of Soo-yeon's blood from his car.
Amidst this chaos, Sun-hui's world shatters further as she discovers shattered glass in her bedroom and living room windows. Tripping over a shard, she's left with a painful injury. Panicked, she catches sight of the black-cloaked figure, knife in hand, and flees in terror. Dong-ho receives a shocking revelation from Sang-woo: Hyun-woo's attacker was none other than the presumed dead Soo-yeon.
As if fate were conspiring against them, Eun-joo arrives at the police station at this very moment, unaware of the horrors unfolding at Sun-hui's home. Sun-hui, now a frightened fugitive, sprints out of the house, pursued relentlessly by Soo-yeon, the enigmatic figure cloaked in darkness.
Eun-joo divulges to Dong-ho her intention to bear witness for Jin-hyeok, presenting his alibi to the authorities in a bid to clear his name. Meanwhile, Soo-yeon's confession to Sun-hui is punctuated by a violent blow from a shovel, sending Sun-hui crashing into unconsciousness. Without hesitation, Soo-yeon drags her victim to her bedroom, where she binds Sun-hui to a chair, her eyes blazing with vengeance.
Dousing the room with paint thinner, Soo-yeon's voice drips with malice as she threatens to replicate the agony she's endured onto Sun-hui. Her accusations fly, blaming Sun-hui for her attempted murder, a crime that followed her own act of taking Kyeong-ho's life. However, Sun-hui's steadfast denial of Kyeong-ho's murder only fuels Soo-yeon's fury further.
Thanks to Eun-joo's compelling testimony, Jin-hyeok finds himself freed from the confines of prison. His first thoughts turn to Hyun-woo, and he rushes to the hospital, heart heavy with concern.
As for Sun-hui, trapped in Soo-yeon's twisted game, she attempts to soothe the raging storm within her captor, revisiting the tragic events that led to Gyeong-ho's demise. Sun-hui reveals a crucial detail: Gyeong-ho was alive when her mother entered his room to check on him, and she confesses that Eun-joo was not responsible for the blaze that consumed Kyeong-ho's home.
This revelation serves as a spark that ignites Soo-yeon's paranoia anew. She accuses Sun-hui of manipulating Jin-hyeok into plotting her demise. Just as tensions reach a boiling point, Hyun-min's unexpected arrival disrupts the macabre scene. Spotting Soo-yeon poised for the ultimate act, Sun-hui's desperate call for help alerts Soo-yeon to their unwelcome guest.
The narrative shifts to a poignant scene where Jin-hyeok and Eun-joo venture to the hospital to visit Hyun-woo. Dong-ho, filled with remorse, approaches Jin-hyeok and confesses that Hyun-woo has testified to Soo-yeon's guilt, accusing her of the stabbing. Eun-joo, anxious for Sun-hui's well-being, attempts to reach her on the phone, only to find the line dead. Her worry escalates, and she shares her concerns with Jin-hyeok. Dong-ho, sensing urgency, promptly alerts the authorities and hurries Jin-hyeok and Eun-joo towards Sun-hui's residence.
Meanwhile, chaos ensues at the Choi family's abode as flames engulf the house, with Sang-woo lying unconscious outside its gates. Hyun-min, his intentions sinister, carries an unconscious Sun-hui to his car, leaving Jin-hyeok and Eun-joo fraught with worry for her safety amidst the firefighters' valiant efforts to quell the inferno. A haunting flashback reveals Hyun-min casually igniting a cigarette and tossing it into Sun-hui's room, igniting the blaze.
Soo-yeon, having freed Sun-hui, attempts to flee the burning mansion, but their escape is thwarted by Hyun-min. Sun-hui, bewildered, watches helplessly as Hyun-min commands Soo-yeon to return inside and perish in the flames. Desperate to save Soo-yeon, Sun-hui intervenes, only to be brutally pushed aside, losing consciousness. Hyun-min's threats against Soo-yeon are cut short by Sung-woo's arrival, who brandishes his intention to confront Hyun-min.
Hyun-min weaves a deceitful narrative, falsely accusing Soo-yeon of arson and attempting to murder Sun-hui. Sung-woo, misled, sides with Hyun-min, unaware of the treachery brewing. However, Hyun-min betrays Sung-woo, plunging a knife into his chest and rendering him unconscious. With Sung-woo's gun now in his possession, Hyun-min menacingly threatens Soo-yeon's life. In a twisted ploy, he coerces Soo-yeon to reclaim her knife, falsely claiming it was she who stabbed Sung-woo.
The episode lurches towards a shocking climax, punctuated by the sound of a gunshot as Hyun-min fabricates a story that Sung-woo had fired the fatal shot. As the screen fades to black, Hyun-woo's dream of a grand home, where his industrious family could thrive in harmony, lingers, providing a poignant conclusion amidst the turmoil.
