The story begins when the Ruling Elder of Harappa Land sent a few of his robotic people to seek out the sacred treasure of their kingdom: The Landtool.
Chasing a thief who stole his Daifuku across Tetsuwan before cornering him at the Tansan Kingdom, Robotack is arrested by a pair of Baby Elephant Robo guards.
Though Kabutack remains to continue his search for the magical sword that can counteract the shield, he has assistant Kamerock accompany Robotack to Ohedo Town where they find Lamune and her two kidnappers.
As Kamerock deals with Darkrow and Kabados, Robotack saves the princess and gets her to safety while learning her abduction was orchestrated by Torabolt.
Sneaking into the Union of Toruboruto with the help of a padre to stop the wedding, Robotack and his friends are at a disadvantage until Kabutack arrives with the magical sword.
When he then admits his feelings for her, Robotack is shot down as Lamune tells him that her heart belongs to the knight to treated her with kindness while in Torabolt's dungeon.