A North Korean boy and his sister are sent to a labor prison camp after their father's failed espionage mission. To save his sister, the boy agrees to become a spy and infiltrates South Korea as a teenage defector. He attends high school, meets another girl named Hye-in, and rescues her from bullies. However, South Korean Intelligence starts tracking him, and his own government sends an assassin to eliminate him.

Commitment
A young man embarks on a treacherous journey to safeguard his sibling, driven by a strong sense of duty to honor his father's legendary legacy as a North Korean spy.