When a water main breaks at the historic St. Agathas church cemetary, the cemetary is flooded resulting in coffins being brought up and corpses being exposed. Brennan is called to identify the remains and help return them to their final resting pace. Father Matt informs Brennan and Zack that the latest burial was 50 years ago, but Brennan finds a skull that had been buried less than five years ago which they believe is part of a murder. The mystery around the murder increases when Father Matt grows strangely ill. Meanwhile, Hodgins' and Angela's romance beings to heat up, but Angela is thrown off guard when Hodgins makes a bold move.