Episode 7 of Bitter Sweet Hell peels back layers of deceit, unraveling a tangled web of manipulation and revenge. The episode opens with a haunting flashback, showcasing Young-won's desperate attempts to win over the Choi family, particularly Sa-gang, whose disapproval hangs heavy in the air.
Fast forward to the present, the facade of normalcy crumbles. Se-na, the enigmatic mistress, urges Jae-jin to flee after their scheme falters. However, Jae-jin's loyalty lies with his family, leading to a tense standoff with Young-won, who nearly hits him with her car.
Inside the Choi household, secrets continue to fester. Do-hyun's surprise girlfriend introduction throws a wrench into Young-won's carefully constructed world. Meanwhile, a tense dinner brings the family together, but Jae-jin refuses to explain his suspicious "ghost surgeries," leaving Young-won to embark on a clandestine investigation into Se-na's past.
Se-na, cloaked in an aura of mystery, visits an orphanage, encountering a young girl abandoned by her mother. This encounter fuels her vendetta, reinforcing her vow to hate those who betray.
The episode masterfully utilizes parallel narratives. While Young-won and Dr. Oh desperately search for answers, Moon Tae-o uses his cunning to manipulate Dr. Oh, twisting the narrative to paint Jae-jin as the victim.
In a shocking reveal, Jae-jin throws a grand feast, exposing the truth to his family. He lays bare the manipulative forces that shaped his life, including his mother's suffocating expectations, the hidden surgeries, Young-won's father's death, and the orchestrated union between him and Young-won orchestrated by Sa-gang.
Despite Young-won's pleas about Se-na's manipulative tactics, a devastated Jae-jin leaves, packing his bags to escape the emotional turmoil. Se-na's true objective is revealed - to dismantle Young-won's world by exploiting Jae-jin's trust.
However, Se-na's carefully laid plans take an unexpected turn. She arrives at the airport for their supposed rendezvous, only to be met with an empty gate. In a surprising twist, Se-na is revealed to be in cahoots with Go-myu's secretary, seeking vengeance through a calculated alliance.
As the dust settles, Jae-jin finds himself returning to the clinic, a sanctuary amidst the chaos. Meanwhile, Young-won discovers Se-na's manipulative messages on Jae-jin's phone, prompting a frantic search for hidden cameras in their home. Her worst fears are confirmed - the house is crawling with Se-na's eyes.
Sa-gang's storyline also takes a significant turn. She visits Kang-sang, a reveal that suggests a long-standing connection with his father. Here, she grapples with the fear of being ostracized by Jae-jin, a reflection of her own strained relationship with her deceased father.
The episode concludes on a cliffhanger. Kyung-min, fueled by suspicion, unearths inconsistencies in Se-na's past, particularly surrounding the deaths of her family members. He confronts her with a chilling text message, accusing her of murder. Se-na, panicking, reaches out to Young-won, realizing she has underestimated her opponent. Young-won, staring back at Se-na through a hidden camera, welcomes the challenge, setting the stage for a thrilling showdown in the episodes to come.