Connected by phone in the same home but 20 years apart, a serial killer puts another woman’s past — and life — on the line to change her own fate.

A gangster tries to clean up his life to care for his sick sister and nephew. But someone targeting him accidentally kills them instead. In shock, he decides to take revenge.

Park Jung-Woo is a prosecutor at Seoul Central District Prosecutors’ Office. One day, he wakes up and finds himself in locked up at the police station. He has temporary amnesia. Park Jung-Woo is falsely accused and is sentenced to death. He must struggle to prove his innocence.