Precocious eleven-year-old self-made-supersleuth Sophie "Sesame" Seade investigates the disappearance of Jenna Jenkins, a student at Cambridge University, where Sophie's father is chaplain and her mother is Head of Christ's College.

Eleven-year-old self-proclaimed supersleuth Sophie "Sesame" Seade gets more than she bargains for when she discovers why Cambridge University's rowing team is mysteriously falling ill.