Dev and his pet cat, Tuna, are ready for a summer of sleepovers, endless games of cricket and sweet mangos, until they discover a Yeti loose in Kathmandu. It ransacks the kitchen, creates messes around the house and eats all the snacks – but Dev gets the blame! With his parents threatening to send him away for the summer, will Dev and Tuna be able to prove his innocence… and catch a Yeti along the way?