Bronny, a young Australian, finds herself down and out in London. She's a sweet girl who has spent her teenage years in a fearful, cautious bubble. She's never taken drugs, had sex or killed anyone. Within six weeks she's done all three. A group of backpackers break into an abandoned London townhouse seeking a rent-free life of debauchery. 

They don't realise someone's already there: a terrified woman bound and gagged in the basement.