"Nana reached out and grabbed Pipi and Pou. Dont move, she muttered. The large pincer belonged to a giant ppaka, which rose up from the water, revealing the top half of its brown and gray body which was as big as Nanas car. As it approached the whanau the paddle crab snapped its two enormous, sharp, serrated claws. Join Pipi, Pou, and Nana - kaitiaki with a superhero difference - as they solve the mystery of the flooding on the east coast. They say its a tsunami but Nana knows better, and she is determined to fix it, even if she gets her socks wet in the process"--Back cover.