When his housemate dies under mysterious circumstances, Nic Cross inherits a mysterious pyramid-shaped contraption left at the scene, unwittingly summoning a cult of wolf-people who dwell in the dark underbelly of London. As Nic's path crosses with three troubled strangers, they must unite to defeat the Lord of Wolves, before they're transformed into one of his beastly pack.

在一个偏僻的山顶，有位神秘的陌生人从暴风雨中出现，向惠普利一家寻求庇护，而惠普利一家有著三个被妈妈严格管教的年轻人，以及失踪未果的神经质爸爸。这神秘的「陌生人」到底与惠普利一家和这间诡异的古堡有什麽关联？更可怕的是，某个夜晚，惠普利发现自己浸在血液中，束缚在床上无法动弹……。

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.