Tales of Symphonia focuses on the two worlds; one world prospers at the cost of another. In one of these worlds, Colette Brunel and her guardians embark on a journey to save their world called Sylvarant and to replenish it with the needed mana. However, they do not know if they will be able to save their world, as well as the cost they will need to pay to save it.—Scientiiaa

Two parallel worlds occupy the same space, unknown to each other. But if one prospers, the other withers. The dying world of Sylvarant has one chance to survive. Colette, the "Chosen One," is sent on a journey to replenish her planet's supply of mana, the source of all life. In exchange, though, she must become an angel, leaving her human life far behind. Colette is joined on her travels by childhood friends Lloyd and Genis, who swear to protect her. However, as they get closer to their goal, the Tower of Salvation, the group learns the terrible truth behind "world regeneration."—Crunchyroll