Part 1

When Cecilia Allanson is invited to her friend Lizzie's family estate for their annual summer costume party she never imagined she'd be investigating a murder.

But when the maid of one of the other guests is found murdered on the eve of the party, and one of the housemaids is accused of the crime that's exactly what happens.

With the help of Lizzie's older brother Freddie, Cecilia must uncover the identity of the read murderer without arousing their suspicions.

Or she could be next!