After a failed operation late one night, genius surgeon Gu Yan meets Lin Wan, a mysterious survivor. Lin Wan’s composure in the face of her family’s deaths arouses Gu Yan’s suspicions, and he accidentally glimpses her secret: she may be the culprit behind it all. He says nothing, but soon finds himself swept into the vortex of her fate.
As he investigates, Gu Yan discovers that Lin Wan is a university student at a prestigious school. The more he learns about her, the more he uncovers the truth: as an adopted daughter, she endured years of inhuman abuse. Beneath her outward obedience lies a revenge plan years in the making. Heartbroken over what she has suffered, Gu Yan resolves to become her accomplice and her blade, but she repeatedly turns him down. “You belong in the light. You shouldn’t come die with me.”
But when Lin Wan sets her final plan in motion, intent on taking her enemies down with her, Gu Yan arrives just in time with crucial evidence. He has uncovered the old case of her adoptive father murdering her biological parents. In the end, the law brings the guilty to justice. Lin Wan turns herself in for the choices she made in the past, while Gu Yan waits for her to begin again in the light. Their two worlds collide, then redeem one another, and together they walk toward the dawn.