The Curse of the Ancient Emerald

In "The Phantom's Riddle," Bayport is shaken by a series of high-profile robberies, including a priceless painting and ancient samurai swords, all linked to a notorious ex-con known as the Phantom. With the Phantom mysteriously vanished, brothers Frank and Joe Hardy find themselves receiving ominous riddles that may lead to his next heist—the valuable Emerald of Astara. Racing against time, the boys must decode the clues to prevent another theft and unmask the elusive thief.