Promo City is blazing with advertising pollution, but all sixteen-year-old Bjorn Bear cares about is having fun, until the city’s deadliest assassins attack him. With his motley gang of friends by his side, Bjorn must evade a crime boss with a vendetta, overcome genetically-engineered mini hippos, and race against time to discover and stop whoever is out to get him—all while facing the possibility that the only family he’s ever known isn’t real.