In 793 CE, an adult from modern Earth, stripped of his name but retaining memories of the Vikings TV series, reincarnates into the body of 16-year-old Björn Ironside in Hedeby, six months before Lagertha kills Earl Sigvard and becomes Earl Ingstad.
Struggling to adapt to Björn’s warrior life under Sigvard’s abusive rule, the MC navigates his new reality, integrating Björn’s memories and skills while grappling with his modern sensibilities.
Unbeknownst to him, he’s been granted two divine gifts: something like nanomachines from Tyr, enhancing his strategic thinking, reflexes, physical body and healing slightly beyond human limits, and a blessing from Njord, ensuring favorable winds for his sea journeys.
As he trains with Lagertha, bonds with her, and faces Hedeby’s dangers, the MC uses his knowledge of the show to protect his mother and alter the saga’s course, discovering his powers through cryptic dreams. The story explores his emotional growth, the clash of modern and Viking values, and his quest to survive and shape history in a brutal Norse world.