Pangur, the abbey cat, spoils the painting of the artist Niall, who in his anger accidentally kills the young monk Martin. Martinís sister, the bloodthirsty Princess Finnglas, pursues them both out to sea. Niall disappears underwater, following the singing of mermaids, and is trapped by them. Finnglas dives under looking for her lost horse, and is offered up to the monster Pengoggen. Pangur goes after both of them. He learns that only Arthmael can save them. But who and where is Arthmael, and can Pangur reach him in time?|
Synopsis provided by the author.