When the crew of pirate ship Ramshackle find a tiny baby adrift on the high seas, they are a bit flummoxed. Even more so, when they discover it's a baby girl. The adventures that follow in this rollicking tale are full of laughter and surprises, as the pirates sew diapers, make baby clothes out of pirate shirts and even a toy squid out of pirate gloves for the new arrival. The pirates won't give up their baby - not even to the women pirates who pass close by. And when a huge sea monster appears, it's baby Isla who saves the day, to become a true Pirate Baby.