Tumtha reveals the story of the Coláistí Ullmhúcháin, seven boarding schools founded across Ireland in the early years of the State amid urgent efforts to revive the Irish language, and keep it alive. Through the memories of the remaining former boarders, the film immerses viewers in an ambitious educational experiment, and explores the powerful, often conflicted feelings the language continues to evoke. It speaks to the enduring bond between language, memory, and the many ways we belong.