Following her Transmigration, Host Aria Montgomery becomes a villainess. She plans to enjoy an early retirement in this pocket world but The System warns she must finish the storyline to survive. The original owner was the substitute wife for Arthur Kincaid, who killed herself after being forced into divorce when his first love returned. Handed this nightmare start, Aria changes tactics. She plays the Suona for the late husband at a banquet, hits on the ruthless villain Felix Kincaid, and swaps a love potion for croton powder, totally ruining the main romance. Over time, Aria discovers Felix isn't as cold as he seems. The truth behind his leg injury and car crash points to his adoptive father, Raymond Kincaid. When Raymond forces Felix to choose between poisoned drinks, Aria snatches the poison and drinks it first. To save Felix, she trades all her points for one last day of life, dying with a smile right after saying I do at their wedding. Her mission is complete and her memory is wiped, but the mole on her wrist remains—a mark to find each other across countless worlds.
