A series of clues finally leads the group, now held hostage by Ian and his cohorts, to Trinity Church in New York City. Behind a crypt is a subterranean maze of stairwells. Deep below is a hidden room, but it’s empty. Ben’s father cons Ian into believing that a clue inside the room means that the treasure is hidden in Boston’s Old North Church. Ian strands Ben and the others underground, seemingly with no way out. Ben finds a secret opening leading to another room, which has another secret door, which leads to the room containing the massive treasure and an exit to the surface. Ian and his accomplices are arrested while breaking into the Old North Church. The treasure is divided among the museums of the world, and Ben and Riley each get a cut, making them fabulously wealthy. Ben and Abigail hook up.