In the world of Silvoria, where the cultivation of Life Seeds determines one's power and status, Aeon, a young genius, awakens not one, but two Life Seeds—a rare feat indeed. However, his joy turns to horror when his S-grade Life Seed bring disaster to him and his family under the scrutiny of jealous rivals and an unimaginable mastermind. His entire family is brutally massacred, their lives claimed by those who covet the S-grade Life Seed pulsating within him. With the extraction of his S-Grade Life Seed and his father's fate unknown, along with death looming over him, Aeon finds himself standing on the precipice of despair. Yet, in the darkest moment of his life, fate intervenes. In Aeon's near-death experience, he gains an acknowledgement of an Ancient Artifact named 'Grimoire of Life and Death', which leads him on an unexpected journey as he is thrust into the Trial Realm of Life and Death. Armed with the enigmatic artifact known as the Grimoire of Life and Death and his remaining F-grade Life Seed, Aeon embarks on a perilous journey to seek retribution against those responsible for destroying his family.