Uncle Pete's plane is missing, AGAIN! It's been shot down by evil wildlifehunters and has sunk deep into the cold Arctic sea. That means Uncle Pete and TM will have to go and find it, fix it and bring ithome.But how? By Squirrel Submarine, of course!But wait! The crew of the Squirrel Submarine are having a well-earned rest atthe NutLand Holiday Park after their last adventure, which means Uncle Peteand TM will have to drive the submarine themselves.How hard can it be?Pretty hard, as it turns out! Uncle Pete and TM get themselves into all kindsof crazy underwater adventures and dilemmas as they search the deep fortheir plane. MEANWHILE, the lost plane has been discovered at the bottom of the oceanby a clever and curious octopus who decides to fix it and use it to explore hisworld, helping other sea creatures along the way.