Driven by a stepmother's coercion and a seriously ill mother, eighteen-year-old Claire has no choice but to take her stepsome's place and step into the home of mafia leader Rex. Unexpectedly, the playboy young master runs away from the wedding, and underworld crime lord Rex makes a prompt and decisive decision to personally take over the marriage! Overnight, Claire transforms from a sacrificed scapegoat into the pampered wife of the underworld boss. Originally thinking she had fallen into an irrecoverable abyss, she never expected that the notoriously ruthless underworld godfather would show ultimate gentleness and thoughtfulness on their wedding night. Interwoven with the taboos of identity and deep doting affection, a misplaced wealthy romance thus begins.