Adventure Time wiki: Most people don't know aboutSo i'll give you guys the full blown backround story of Adventure time. One day there was little boy named Finn and he had dog named Jake. Finn had no friends his mom paid no attention to him, but he had one friend his dog. One day he and his dog went bike riding it was summer the dog was infront of the bike. They down a steep hill Jake and Finn got tired so Finn put the bike on brake. He was trying to get water for Jake but the Jake died of dehidration Finn was lonely, but about 3 weeks later Finn fell in a death like comma. Into the dream of The Land of ooo. With his magical dead dog Jake.