When Hönan is kidnapped, the mischievous green pranksters Kalle Stropp and Grodan Boll set off on a wild chase. After many perilous adventures, they manage to rescue their friend. But they would never have succeeded without Plåt-Nicklas' help.

Something strange has been spotted over the tree tops in the forest where Charlie Strap and Froggy Ball live, and Plåt-Niklas quickly builds a monocular to examine it. It turns out to be an emergency signal and the two friends together with Plåt-Niklas and The Parrot set out on an expedition to resque whoever is sending the signal.

Kalle Stropp, Grodan Boll and all their friends chasing Sotisarna, who has stolen Plåt-Niklas propeller.

Something strange has been spotted over the tree tops in the forest where Charlie Strap and Froggy Ball live, and Plåt-Niklas quickly builds a monocular to examine it. It turns out to be an emergency signal and the two friends together with Plåt-Niklas and The Parrot set out on an expedition to resque whoever is sending the signal.