The naughty girls of St Trinian's are at it again! It's a new semester and the schoolgirls return to the usual chaos and excitement. After discovering headmistress, Miss Fritton (Rupert Everett) is related to a famous pirate, Celia (Juno Temple) and her friends go on and adventurous hunt for buried treasure. The girls must face their most fearsome rivals yet but the feisty and ever-resourceful girls of St Trinian's are undeterred in their mission to outwit the villainous Sir Peirs Pomfrey (David Tennant) and his sidekicks from the women-hating secret society known as AD1. Also starring Colin Firth and Toby Jones.