Fifteen years ago, the Utsugi family finds an abandoned baby and decide to take him in. They name the infant Lenka, and he is raised lovingly by his adoptive mother, father and older sister Iroha. They live in Agir, a refugee commune. One day, Lindow Amamiya, a God Eater, appears and encourages everyone to take the patch test. Anyone testing positive is considered to have attributes of a God Eater, and will be allowed into Fenrir, including any blood-related kin. Lenka's father despises this discriminatory method of selection. However...

There is a high possibility that the irregularity in the guiding devices may have been due to internal hacking. Surrounded by Vajra, Lindow continues his lone battle. Lenka acquires a new God Arc and gets Lindow out of harm's way in the knick of time. Reasoning that someone must have set another guiding device that suddenly distracted the Aragami, Lindow sets out to find and destroy it. But Deus Pita appears before him. It is an uphill battle for Lenka and Lindow, but the 1st Unit arrives to help.