Sherin, a magic user within the kingdom of Xanadu, discovers the wreckage of a futuristic mech crashed in the wilderness. Inside, she finds the mortally wounded pilot, Fieg Kamara. Sherin uses her magical abilities to cast a resurrection spell, saving Fieg's life after his fatal accident. This act binds him to life but erases all his memories, including his identity and origins as a soldier from 21st-century Earth. Following his recovery, Fieg remains in Xanadu under Sherin's care, adapting to life there.

Later, when the evil wizard Agora murders the king, Sherin takes up arms against Agora and his forces. She aligns herself with Princess Rielle and others opposing Agora's rule. Sherin contributes to the conflict, drawing upon Xanadu's magical traditions and demonstrating loyalty to its rightful leadership. Her role primarily involves supporting the protagonists through her knowledge of magic and the kingdom.