Yoon Junseo, known as Black Mask, has finally returned to South Korea after living in New York after many years. There is one person who hasn't told his childhood. Best friend Chung Cha, who's now a famous actress at the film Industry. He must keep this secret from her. However, when a threat emerges from a man called The Wolf endangering Mayor Park Ji-Hoon, Junseo and his team, The Avengers must stop him once and for all.