The adventures of Elvira, a 12-year-old girl obsessed with the sea who develops the ability to breathe underwater. Elvira and her dolphin friend Elvar meet a friendly whale, among other creatures, while back on land all is not as it should be.

When the joker Tommy Tricker plays some practical jokes on some of his friends, his best friend Ralph, a stamp collector, discovers the secret of "stamp travel" to make him travel around the world on a stamp to bring back the mysterious Charles Merriweather, who never returned on a stamp for 75 years.