 Berk is a friendly blue creature living in a a castle, home to The Thing Upstairs, the mysterious and unseen owner of the castle who never leaves his room who Berk serves his meals made from living creatures and does jobs for him. Also living in the castle are: Boni, a talking skull who is Berk s best friend, Drut, Berk s pet spider, Rogg, a gigantic pink monster and Bubo, a cheeky small yellow creature who ofter annoys Berk. Berk loves cooking in the Kitchen and would get cheery unless he The Thing Upstairs gives him a hard time. Berk s curiosity about The Trap Door where The Thing Upstairs lives, which is forbidden and Berk always leaves open, Berk encounters strange creatures from The Trap Door and Boni would join Berk in his everyday adventures.