Dorothy (SUSAN LYNCH) and Petula (RACHEL WEISZ) are two women with bad taste in men. Dorothy's boyfriend, Tony (IAIN GLEN), often threatens to kill her, while Petula's boyfriend, Brian McMinn (TOM MANNION), turns such attitudes into physical behavior. It's during one such incidence that Dorothy, who's never met Petula, saves her from another beating by hitting Brian on the head with a large lead pipe.
Although the blow isn't initially fatal, Brian does end up dead, throwing the two women into an unexpected and sudden partnership, with Dorothy worrying that she'll go to prison for saving another woman's life. Accordingly, they don't tell the authorities and move the body out onto the balcony while trying to figure out what to do. That decision is forced upon them when Brian's older and wealthy brother, Ronnie (MAURICE ROEVES), who also happens to be Petula's boss, hires detective George Hepburn (ALEX NORTON) to track down his now missing brother.
With the inspector detective beginning his investigation, Dorothy suddenly decides that the women should fake Brian's kidnapping, figuring they can collect a hefty ransom, even if he's already dead. As the two women begin their ruse and try to bring it through to completion, they must contend with Tony, Ronnie and Hepburn as all three men either uncover the plan or become suspicious of the women's behavior.