Kenichi is overjoyed when he receives an 8mm camera for his birthday. He immediately decides to use the camera to make a ninja movie starring him. However, Kenichi, who can't imitate the movements of a ninja, changes the main character to Hattori and continues filming, but Hattori is too conscious of the camera and can't behave well.
誕生日に８ミリカメラをもらったケン一は大喜び。早速カメラを使って自分が主演の忍者映画を作ることにする。しかし忍者の動きを到底真似できないケン一は、主役をハットリくんに変更して撮影を続けるのだが、ハットリくんはカメラを意識しすぎて上手く立ち振る舞えなくなってしまう。
