Based on the novel "Chronexia and the Eight Seals", this anime series follows the adventures of Tom Watson and his friends as they fight the forces of evil to protect the planet of Mana.

Tom is a self-taught swordsman from Tamber, spending his days passively going to school and training with his two best friends, Misty and Noemi. When a vanquished enemy from the past returns to exact revenge and kidnaps Tom's parents, Tom must embark on a quest to rescue them. Despite constant grim reminders that show just how inexperienced he really is, with the help of his friends, Tom clings to the hope of pulling through all the hardship in his path.