Genius pharmacist Selena carries a nerve‑binding toxin inside her. Hunted by European plutocrats, she has a one‑night encounter with Lucas, heir to New York’s wealthiest family.Back with her family and pressured into an unwanted marriage, she impulsively marries Lucas, who is disguised as her driver. Both hide their elite identities. In their contractual marriage, they take down enemies together, uncover the truth behind the toxin, and destroy a corporate conspiracy. In the end, they save each other’s lives and stay devoted for a lifetime.