Nene's Monitamon infiltrate Musyamon's castle and report that his forces are going to invade the Monitamon Village to take the Code Crown by force. This places the Fusion Fighters in a situation as they need to protect the village rather than save the princess as they planned. Wanting to impress Nene, Jeremy offers to sneak into Musyamon's castle with the Rare Star Sword and a group consisting of Dorulumon and a trio of red Monitamon.