Otters hold an almost unique place in the animal kingdom of the British Isles, being one of the very few creatures that give birth once every two years. They are the most secretive yet also the most popular mammals – they are found in every county but are so rarely seen that they have been raised to mythical status. Simon Cooper lives in a normal house in a normal village, but with one extraordinary feature. Wild otters live in his house. This close relationship has given him a unique insight into the life of otters. The female otter, Kuschta, is the central character to this story, but Simon interweaves her personal story with the natural history of the otter.