The game picks up directly after the end of the first game taking place on a mysterious Caribbean island where Heileen was shipwrecked with her friends. Heileen soon discovers a deck of tarot cards representative of the seven deadly sins and the seven heavenly virtues. The cards have the power to change both her dreams and her reality, and will help Heileen discover many hidden things from her past:

- How exactly did her parents die? Was it an accident, or not...?
- Who is Marcus?
- What role did Jack have in her life?
- And ultimately, what does she want to be? A saint, or a sinner?

The game features 15 unique endings and an enhanced version of the original quest system in Heileen with 20 quests.