The Doctor and Amy Pond arrive in a small boat just in time to save some villagers from drowning when their tiny 13th century Japanese village is flooded yet again by a dragon of the sea that disappears as quickly as it arrives. The Doctor offers his help but the villagers already have help from the worst Samurai in all of Japan, Shoju. In return for protecting the village, Shoju is allowed to stay — but his efforts aren’t good enough.