Once Byung-su was a serial killer - he killed those who, in his opinion, deserved to die. But it was a long time ago, because after a tragic car accident he ended up killing. Currently, the man lives with his teenage daughter, Eun-hee, and struggles with Alzheimer's disease - his memory is unreliable, and the memories are more and more fragmented. Meanwhile, a new wave of homicides appears in the city, and Byung-su wonders if he is responsible for these crimes.

A man without memory is a crime thriller based on the best-selling novel by Kim Young-ha (Black flower, Empire of lights, I can leave when I want). Within 5 days of the premiere, the film won a million viewers, becoming one of the box office thralls of the Korean box office. The main role
the film was played by Kyung-gu Sol who for human without memory received 2 awards for the best actor (Korea Film Reporters Association Film Awards and Director's Cut Awards).