Hayato Ando is an ordinary student in Tokyo... until he awakens his Dual Soul, a power that summons Trigger, a versatile warrior from another dimension.

Now, as he tries to manage his school life, Hayato finds himself trapped in a secret world of people with powers, organizations that hunt them, and creatures that appear from other dimensions.

With the help of other Dual Souls, Hayato must learn to control his power... before those who hunt him make him their next weapon.