A group of friends finds themselves stranded in an old hotel in Thailand. As they uncover the history beneath the walls, they're slowly drawn into its sinister past, making it even harder to get out alive.

When the Ronin Gang robs an armored car, three cops — Chan, Fong and Wai — go on the warpath. Each has a personal interest in bringing down Ronin leader Tien: he killed Chan's fiancée, humiliated Fong and kidnapped Wai's brother.