On the planet Erda, the teenager Ayjay and his enemy, Grith, run an all-day marathon to decide a matter between them – a Stir Trial.
The story is set on another planet with a non-technological society. There are no animals to ride on and no machines to transport people at a fast rate. The result is that the fastest way for people to travel is by foot. The civilization is built on a culture of walking and running.
The main characters are teenagers attending the "Imperial School". They are Ayjay, his girlfriend Deena, and his friend Jaston. Grith is a year older and an adversary.
The story: A group of pupils at the Imperial School decide to try to oust the arrogant Grith as School Leader and to elect Ayjay in his place.
They present a proposal to the School Board to impeach Grith. The Board rules that the issue should be decided by a Stir Trial.
A Stir Trial is a long footrace, similar to an ultra-marathon. The boys set off on the Trial that would take all day and test them both to the utmost. Ayjay finds that he does not only have Grith to contend with. He is almost killed by unexpected events. And he meets strange and wonderful people on the way. Who is going to win?