Toward the end of the EDO period, Japan was attacked by a group of mystical villains. The beautiful Princess Kiri was kidnapped. Many Samurai warriors were sent to rescue her. None ever returned. You are a daring young Ninja named Kage. You are also the last hope for Princess Kiri's safety. You will need all your courage and Ninja skills in your attempt to rescue the fair Princess from her evil captors!
--From the NES Legend of Kage, The instruction manual.