Cyril, a fallen noble, had his title stripped by his uncle. Facing certain doom, he struck a soul contract with a dark unicorn to survive. Living under an assumed identity, he used his “golden sense of smell” and mastery of pharmacology to amass wealth and plot his next move. On his quest for revenge, Cyril is forced to take the place of a bride and marry Lionell, a commander rumored to be cold-blooded and brutal—only to discover that he is actually the lover who has saved him from peril on multiple occasions. The two join forces to shatter court conspiracies and family feuds, ultimately breaking the dark curse with the blood of their undying love and finding new life.