A young boy named David, on holiday at his grandparent's in Arbroath, Scotland. Has a dream that he meets up with Podge and Dodge on the beach at Lunan Bay.And the elves use some of their magic powders to make his plastic submarine so big, that they are all able to get inside.They then have an adventure beneath the sea, where they meet Nessy the Loch Ness monster.She swallows them and, like Jonah from the whale, they are eventually disgorged, because of some other magic powders carried by Podge and Dodge.This illustrated children's story is the second in the series of six books following the adventures of the two fearless elves, Podge and Dodge.