The perfect birthday or the perfect nightmare? Katelyn smiles at her husband and friends, gathered to celebrate her thirty-sixth birthday in their beautiful home decorated with fairy lights. But the next day Katelyn wakes up shaken and terrified in a hospital bed...

She doesn't remember the sweet taste of birthday cake icing, or how angry her best friend was at midnight, or the terrible things her husband said. She doesn't remember the party at all.

When she asks her husband what happened the night of the party he says 'nothing'. But her blood runs cold at the way his voice lilts slightly. The way it always does when he is lying.

Did someone at the party harm her? What is her husband hiding? Or did Katelyn herself do something terrible?

Only one thing is certain. Nobody can be trusted. And if Katelyn's memories of the party do come back, it will tear them all apart...