Nolan Wyatt, a former mercenary, transmigrates into a disreputable household in North Mountain Fortress. Original owner drove arranged bride-to-be Seraphina Lane to attempt suicide. Nolan saves Seraphina, decides to repay debts. He earns a living, Seraphina regains hope, people see he's changed. Squad Leader Ding Lee targets him repeatedly, undercurrents swirl in North Mountain Fortress. Everyone sees Nolan as the old household, unaware he's a true mercenary.