The Secret Seven are Peter and his sister Janet, Jack, Colin, George, Pam and Barbara. They meet every holiday in the shed at the bottom of Peter and Janet’s garden – and solve mysteries, and eat lots of delicious food. But no one can enter the shed without whispering the secret password!

Something mysterious is going on at Tigger’s Barn, and the Secret Seven are intrigued. Peter thinks it’s all just gossip, but Jack isn’t so sure when he overhears a strange conversation. Soon, the Secret Seven are hurtling into a new adventure.