Ottoline Brown and her best friend, Mr. Munroe, are usually inseparable....But Mr. Munroe has gone on a secret mission to Norway to find the snaggle-toothed, super-hairy Quite Big Foot. Ottoline sets off over the sea by submarine, silver seaplane and even a raft to find Mr. Munroe--before he comes face to face with the terrible troll all on his own.