The TV drama series, which debuted on RTÉ2 in 2015, follows four young friends on their adventures to find ghosts, first in an abandoned school, and then in a derelict hotel. Actors Lioyd Hogan, Zena Donnelly, Tadhg Moran and Harry Behan reprise their roles as the fearless ghost hunting team who are hired to solve a mystery in an ancient, haunted castle.