Old Jack and Salty have been washing up - there are bubbles everywhere! Jack remembers a very bubbly story when Little Ernie took some homemade bubble mixture to the beach. In the rockpool, Belinda the Blenny is enjoying swimming through the bubbles that are appearing. But Bertrum the Butterfish doesn't like the bubbles and wants to get rid of them all. How can Belinda and her rockpool friends make Bertrum like bubbles?