John har glemt det eneste man ikke må glemme - oldemors fødselsdag. Nu er gode råd dyre, hvis John skal tilgives af oldemor, og han må bruge al sin snilde til at få stablet en rigtig fest på benene. Festen bliver dog forstyrret af en mindre ildebrand, og så må John redde dagen, på ægte diller-maner.
John has forgotten the only thing one must not forget - great-grandmother's birthday. Now good advice is expensive if John is to be forgiven by great-grandmother and he has to use all his ingenuity to get a real party stacked on his legs. However, the party is disrupted by a minor fire, and then John has to save the day, in true diller manners
