Seventeen-year-old Ginny had always admired her aunt Peg, a free-spirited artist who often disappeared for months, most recently to Europe. Now Aunt Peg has died of brain cancer, and in a characteristically cryptic gesture made before her death, she arranged for her niece to receive a plane ticket to London, where Ginny will begin a series of adventures. Guided by Peg's friends and the instructions in each of 13 letters her aunt wrote, Ginny sets off across Europe. Staying with Peg's contacts or in hostels, Ginny begins to peel away some of the mythic layers surrounding her aunt, even as she falls into thrilling escapades and a blossoming romance. Johnson's plot stretches plausibility. Would Ginny's practical mother really have agreed to such a solo, undefined journey? But readers will probably overlook any improbabilities and willingly accompany Ginny through her sensitive, authentically portrayed experiences--uncomfortable, lonely, giddy, and life changing--as she pieces together family mysteries and discovers herself.