Castlevania II: Belmont's Revenge is an action-platform game for the Game Boy. It is the second Castlevania title for the Game Boy and serves as a sequel to the previous title (Castlevania: The Adventure). Set fifteen years after the events of Castlevania: The Adventure, Dracula returns and kidnaps Christopher Belmont's son Soleil at his coming of age feast, and turns him into a demon. With Soleil's mystical powers, Dracula retakes human form and rebuilds his castle, forcing Christopher to confront Dracula once again to save his son and Transylvania.