Unlock! Kids: Irish Folklore Trilogy is the fourth installment in the Unlock! Kids series, with new adventures in three settings:

– "Song of the Sea": Help Ben and Maïna unlock the magical creature's feelings and discover Selkies and their powers.
– "The Secret of Kells": Follow the young monk in his learning of illuminations and combat the terrifying creature Crom Cruach
– "Wolfwalkers": Follow the adventures of Robyn who dreams of becoming a wolf hunter and discover the mysterious powers of Mebh, guardian of the forest.