Lea, 7 years, lives with her mom and little brother Jonas, 8 months, in a house on the edge of the forest. One day when Lea is babysitting Jonas and they are playing in the garden, Jonas crawls off into the forest. Lea has to face her fears and go in to find him. There she meets Captain Bik, a small worm-bug creature, that says he's a forest pirate with an army of 1000 pirates. It turns out to be only two. Together they go deeper into the forest to find Jonas. They fight off an evil snake and meet a rat scientist. In the end they find Jonas and get a surprising addition to the group, returning safely back home in the end.