Jonty loves to fish, so he and his dad build a fishpond in their yard. The pond takes a lot of work and maintenance, but Jonty is thrilled to have the chance to fish for rainbow trout.

The most exciting catch of the summer, however, is a giant pike, which Jonty catches from the dock on the lake. By accident, the hungry fish winds up in the fishpond! Even though there's plenty of food available, the pike doesn't like being imprisoned in a pond. Then one day it tries to escape! ---Innokas kalamies Jonttu rakentaa isn kanssa pihapiiriin kalalammikon. Se vaatii paljon tyt ja huolenpitoa.

Kesn jnnittvin kalansaalis on kuitenkin jttihauki, jonka Jonttu nappaa kotilaiturilta. Nlkinen petokala ptyy vahingossa perheen pihalampeen. Vaikka ruokaa riitt, kuningashauki ei viihdy vankilassaan vaan miettii koko kesn pakoa. Lopulta lammikon vanki saa tilaisuutensa.