Set in the 19th century, "Moeyo Ken" follows the life of Toshizo Hijikata. He was the vice-commander of the Shinsengumi and fought against the Meiji Restoration.

This action-adventure follows the exploits of 47 samurai warriors who plot to exact revenge on a court official responsible for their master's death.

A male corpse is discovered with a smashed face and burned hands. Strangely, the cause of death is determined to be strangulation. When Detective Kaoru Utsumi attempts to corroborate the victim’s ex-wife’s alibi she discovers the mysterious neighbor and only a few small clues to help her disprove a seemingly "airtight" alibi...