A female corpse brings to light a new lead in a cold case, reopening the investigation. Jin Yanxi, a professor of criminal psychology, is parachuted into the task force, shocking female detective Li Qingqiu when she learns that Professor Jin once served with the provincial public security department. The investigation points straight at her childhood sweetheart. Trapped in a low point in life by a sealed cold case, the three are drawn together once more. Can they unravel the layers of secrets and traps, uncover the truth, and heal the one they love? It is the most baffling riddle fate has to offer.
