Mary is a Boston murder victim, she works for an organization led by Benny. A year ago, while assassinating a gambling addict who owed money to Benny Mary, he realized that his son was in the next room. She was reminded of remorse, and she continued to watch him out of the shadow. But Danny decides to take his father’s footsteps, becoming an assassin and an offender. Danny has managed to awaken in Mary the maternal instinct she has suppressed all her life and is determined to help him escape from this environment.