Several hundred years in the future, the natural resources of the Earth are exhausted, and the progression of the human race has stagnated. Hajiki Sanada, a delivery boy, lives with mother and sister in Unit Blue, in the impoverished part of the Unit known as 'Night Town'. While delivering a package, he unwittingly stumbles upon a 'Gad', a mysterious device that reacts to the strong feelings of a nearby person. The Gad transforms, taking on the form of a humanoid robot referred to as a 'Techode'. Hajiki soon discovers he isn't the only one who has had contact with a Gad, and that contact with one doesn't always end well. The series follows his struggles to cope with his new friends, his techode, and his life in Night Town.