'Island of the Lost was the isle's name long before the hospital was built. In winter, they say the fog falls so heavy there that you can't see your hand in front of your face. Storms rage so forcefully you can be blown from the cliffs. Once St. Christina's was built, the name took on a new meaning. Very few who went into that place ever left.' Christmas day, and DCI Tom Reynolds receives an alarming call. A mass grave has been discovered on Oileán na Caillte, the island which housed the controversial psychiatric institution St. Christina's. The hospital has been closed for decades and onsite graves were tragically common.…