When a daring mission leads a deep sea submarine team into a mysterious opening on the ocean floor, they uncover a lost underwater world and awaken its ancient race of otherworldly beings.

　　When the remains of two murdered Princes are discovered at the Tower of London, a troubled Priest must put his beliefs aside to befriend a mysterious prisoner, who has supernatural powers to communicate with the dead. Together they must solve the mystery of who murdered the Princes, as prisoners in the castle dungeon meet their bloody fates at the hands of the Princes' ghosts, who continue to haunt the Castle seeking their revenge.