The phone rings in the middle of the night and on the other end of the line, there is the awful sounds of an attack. The couple who received the call rush to its source only to discover a horrific scene. Two teenage sisters, from Taiwan studying English for the summer have been viciously attacked in their basement apartment.

One cold February morning in the dark stairwell of a Toronto apartment building, a security guard makes a grotesque discovery: the dead body of a Filipina nanny. It's clear she's been savagely murdered and raped. Police analyze the list of potential suspects - the boyfriend, the employer, serial offenders in the community.