In the gray streets of Detroit, young Akio experiences the warmth of his mother's hand for the first time as they make their way to meet a stranger. The harrowing reality seeps in when he realizes that he is sold to Moreh, a child trafficker, never to see his mother again. After passing a life-or-death test, Akio is presented with the choice to abandon his past life and become an assassin.

Under the alias "Snake," Akio enters a cycle of regular killings. While he grows more efficient, all of his assassinations haunt him. Everything changes when Snake meets a blind girl whose innocence and compassion give him a new goal, setting him on a tumultuous path that will alter his life forever.