When the Royal twins Remus and Rinda are forced to flee by the invading Mongaul army, they are saved by a mysterious leopard-headed warrior. His name is Guin, but he has no memory prior to meeting the twins. As night falls, the group are attacked by ghouls and must once again fight for their lives.

The battle between the Sems and the Mongaul army has finally begun. Although at first the Mongaul's numerical superiority seems an insurmountable obstacle, Guin's decisive strategies allow the Sems to even the odds.

The Mongaul army discover the hiding place of the Sem, surrounding them at night while they sleep. The Sems are surprised by this attack, and after a short fight attempt to flee; with the Mongaul army pursuing the Sems, all seems lost. Guin arrives with the Lagon and counters the Mongaul army, forcing the them to retreat.

With Mongaul defeated, Skarl heads to Nospherus to investigate the claims that a powerful weapon is hidden there. On their way to Parros, Remus and Rinda are lured into a trap by Sid; they are saved at the last moment by the appearance of Guin. Meanwhile, in Khum, Amnelis is faced with a difficult decision regarding her future.

Rinda and Remus have finally returned to Parros and preparations for Remus' coronation ceremony are well under way. On the day itself, Rinda has a terrifying vision about her brother's dark future. Meanwhile, Guin is making his way north in search of answers about his past, when he meets his old friend Istavan. He wishes to use Guin's power to become King; Unfortunately Guin refuses, and the duo part not as friends but as fated enemies.

Having survived their encounter with the ghouls, Guin and the twins are captured by the Mongaul army and taken to Stafolos Keep. Here they meet Vanon, the Black Count of Stafolos, who threatens to torture the twins and extract the secrets of the Parros Kingdom. Meanwhile, Guin is pitted against the mercenary Istavan of Valachia in a battle to the death.