"Henry, Jessie, Violet, and Benny used to live in a boxcar. Now they have adventures everywhere they go. At a lighthouse, the children find a mystery in the night!"

When the Sons of Garmadon, a new gang in Ninjago City, plan to steal the famous Oni Masks, it is up to Lloyd and the ninjas to protect the masks.

Ella's friend Frankie carved a Halloween pumpkin that he can't wait to show everyone, but as he wheels it up the hill in his wagon, it bounces out and rolls away, and it's up to Ella and her friends to solve the mystery of the runaway pumpkin.