Shin's summons to the castle doesn't go exactly as he thought it would when the princess challenges him to a duel. Then when the aftermath of their fight goes horribly awry, it's up to Schnee to investigate. 

Shin and Rionne spy a large horde of monsters headed straight for Valmer, where they're supposed to meet up with Schnee and Tiera. Can they reach the city in time to save it?