Patrick and Beth board the Victoria in 1521 on its journey to try and sail around the world. But they make a bad first impression when they meet Captain Ferdinand Magellan. The cousins are accused of being witches and must prove their innocence. The crew members watch their every move, looking for an excuse to throw the cousins overboard.
Meanwhile, Patrick finds a friend who has a secret. Beth becomes the new scribe for the voyage, stirring up jealousy from Antonio Pigafetta, one of Magellan’s best friends. After a surprising miracle happens on the island, the crew―and the cousins―must take sides: Who thinks Magellan is unfit to lead? Who is loyal to Magellan and willing to risk their life to prove it?