Alice-Miranda is set for a luxurious cruise aboard the royal yacht Octavia, where Aunty Gee is hosting the wedding of Aunt Charlotte and Lawrence Ridley. Even Ambrosia Headlington-Bear has come along, much to her daughter Jacinta's surprise. There are rumours of a jewel thief aboard but something else is giving Alice-Miranda one of her strange feelings. Why does the ship's doctor look so familiar? And who is the shy blond boy hiding in one of the suites? Can Alice-Miranda solve the mystery in time for the celebrations?