Trinity Trigger is set in the of world Trinitia, where the Gods of Order and the Gods of Chaos previously fought for control. As a result of their battles, the world began to collapse so each god selected a proxy to act as their chosen warrior, with the victor of the fights between the proxies determining the winner of the wider conflict. Main protagonist Cyan Erleus, a young man living in a quiet village, discovers he is a Warrior of Chaos, and embarks on a journey to try and change his fate. He is joined by allies Elise Quoyse and Xantice Geldine, the latter a priest for the Gods of Order.