Five best friends, all married, decide to share a loft apartment. In this loft they meet their mistresses and conquests. Everything seems perfect, until one morning the body of an unknown young woman is found in the loft. The group of friends begin to suspect each other and it soon becomes clear that they know far less about each other than they had initially thought.

Nine-year-old Lisa discovers her sinister new friend is the ghost of the dead twin of Lisa's mother. Lisa's father also begins to suspect his wife of hiding a terrible secret, resulting in deadly consequences...