One day, two-year-old Triton Bloom vanished when his foster parents' caravan was caught in the crossfire of an Alliance attack on a rebel group, leaving his birth parents to wonder his fate. Twelve years later, when five teenaged boys suddenly appear in Harry and Ginny Potter's living room, they notice one boy looks familiar. Could Trowa Barton really be Harry and Ginny's long-lost out-of-wedlock son?