The main character (Thora Birch) follows the "PIG Theory" and ends relationships after six months in order to avoid heartache until she meets a man (Chris Klein) who wants to disprove her theory.
When Katie and Greg Carlyle invited Greg's estranged daughter to live with them, they had no idea that they would be inviting jealousy, violence, and deceit into their home to wreak havoc on their perfect life.