Digimon: Emblem of Crisis Vol 1

It's a field trip to the museum gone wrong! Tai, his sister, and Sora and Izzy all went to the museum for a school field trip, but creatures known as the Risen attacks them, and sends them back to the Medieval times. Prince Chrom and his band of Shepherds then help them all get reunited, but the Digidestined soon realizes, the situation is going to get way worse than they think.