Under the rocks of Iceland is the gargoyles' capital, Gargopolis. Gumpy, Lisby and John Pear are visiting, but quickly have to give up the vacation due to a new task.

The oceans are being filled with plastic! But how will the three friends and all the gargoyles convince the humans to stop throwing plastic in the oceans?

In only a few days they have to save the animals in the oceans and stop the end of the World.