In this adventure-comedy, the spirited girls of St Trinian's embark on a thrilling treasure hunt to find Fritton's gold. Along the way, they encounter pirates, secret societies, and even demonic possession. Will their strong female lead and clever tactics help them find the treasure or will they become victims of their own mischievous nature?

St. Trinian's is a comedy film about a group of rebellious schoolgirls at a boarding school who cause chaos, exhibit unorthodox behavior, and plan a heist to save their school from financial debt.