Poppy Farthing's great aunt, a famous 1920’s fashion designer, was rumored to have hid her life's work nearly 100 years ago. Since then, no one has been able to find it - although Poppy has been making progress. When Poppy's rival in the fashion industry learned about the lost designs, she hired a detective to track them down first. Now, with the clock ticking, Poppy has asked Sullivan for help. The problem is, the other detective is good – and they've got a head start. Can you help Sullivan outsmart the rival detective and solve a 100-year-old mystery?