When a birthday turns out to be a death day...

Hanna Walker wakes up in a hospital bed but has no memory of what has happened to her. When questioned by the police, she is devastated to learn that her lifelong friend, Stella, has been murdered and she herself left for dead, after Stella's recent birthday party.

During the murder investigation Stella's ex husband and several of her former lovers fall under suspicion. When Stella's own activities in the period leading up to the party also come under the spotlight, Hanna is forced to revise her opinion of the woman she thought was her closest friend. But was Stella a real friend?