A mysterious young man known as Saint rescues Princess Fala after her Lion crashes. Back at the Castle Gradam, Raible is convinced that Saint is indeed his long lost son who he had sent away years ago during an attack to the Planet Altea. But Saint is actually a resurrected agent of Galra and when he is left at the controls of Castle Gradam he keeps GoLion busy giving Sincline time to transport a powerful new weapon to Altea…