Amnesia detective Jiang An traces a serial poisoning and murder case using customized medicinal diet. The only clue points to Su Yu, the descendant of "poisonous diet" who was personally sent to prison and acquitted seven years ago. When the memory fragments gradually awakened with her taste, Jiang An discovered that behind the real murderer he was chasing, there was a past that he must atone for. This time, he will use the truth and the rest of his life to heal the light he once destroyed with his own hands.
