After challenging his own father to a duel for the throne, Sincline demands to be turned into a Beastman to defeat GoLion. Honerva tells them a new and improved armor coating she has created that will resist GoLion’s King Sword Jyuohken! Meanwhile, Altea launches an early warning satellite that quickly informs them of the impending Galra attack. With this new Beastman Lambda knowing all of GoLion’s weak points, will the team be able to survive?