Following the murder of her family at the hands of her father in the wake of World War I, a young woman is sent to live in a convent. However, the demons that plagued her father follow, reawakening the nightmares of her past.

Upon taking her vows to become a nun, Sister Sarah is abused, brainwashed and also drugged into submission by the corrupt clergy. On the verge of her own death from a lethal dose of drugs, Sister Sarah receives a message from God telling her to take vengeance on all those who did wrong to her. Armed with God's will and an arsenal of big guns, she dispenses Judgment Day on her former tormentors. When the church hires the merciless motorcycle gang "Los Muertos" to track down and to kill her they soon realize that this sister is one bad mother.

A new, experimental dream-melding drug called 'Wonderland' hits the streets, granting its users the ability to place their consciousness into the bodies of other people. Soon, a serial killer begins to use the drug as a way to live and die as other people by forcing his victims to kill themselves. A detective on the case begins to unravel the killer's methods and motivations, while the latest would-be victims fight back against the powerful mind altering drug from within their dreams.