Grandia tells the story of Justin, a young boy with dreams of becoming an adventurer. He embarks on a journey to uncover the secrets of a world filled with legends and mysteries, starting with the discovery of a mysterious map that may lead to Elkland, a legendary land no one has ever reached. Along the way, he is joined by his friends, including Sue (a fellow adventurer) and Feena (a woman with ties to ancient legends). As the story unfolds, their journey takes an exciting turn, leading to the revelation of ancient technology secrets and a confrontation with enemies who have plans to destroy the world. Through a combination of battle skills, world exploration, and encounters with powerful foes, their adventure is filled with danger and secrets that need to be uncovered.