Renowned S.I.S. assassin David Callan, forced into retirement due to a loss of nerve, is reluctantly pulled back in for one final mission: eliminating German businessman Schneider. In exchange for completing the task, Callan's former boss offers him a chance to reclaim his active status, but Callan's integrity compels him to uncover the truth behind Schneider's target status before taking action.

Callan
A retired elite agent and assassin, David Callan, is reluctantly brought back in for a final task: to eliminate Schneider, a wealthy German entrepreneur, when his own doubts overwhelm him.