A woman’s body floats in the koi pond in the courtyard of a San Francisco house. Someone opens a window, sees her, and screams.

Nicky talks to the cab driver about the Agatha Christie book she’s reading as they drive through San Francisco. He says the city is full of mystery, mystery writers, and killers, as they drive through dense fog. He references a famous unsolved case where a mystery writer is rumored to have killed his wife and child. He is startled when he drops Nicky off at the house where this writer lives. He asks if she’s frightened; Nicky says no.

Nicky is still surprised that the famous mystery writer Sebastian Trapp wrote back to her after she shared an error in his book. His house is a famous mansion, and Nicky is excited. Despite being a happy, soft-hearted person, she also feels she can take care of herself physically. When she rings the doorbell, a beautiful woman opens the door.