After her longtime boyfriend Kevin publicly rejects her marriage proposal at a hotel party, orphan Elena is humiliated by Stella, the Rossi family heiress, who gives her three minutes to find a husband or face ruin. In desperation, Elena proposes to a stranger — Luca, a seemingly broke street thug who is secretly Luca Romano, the all-powerful Capo of the Romano empire, hiding his identity to escape the Elder Council's arranged marriage.Their contract marriage slowly blossoms into real love as Stella retaliates: she frames Elena's brother Liam on drug charges, has Elena kidnapped, and bullies her relentlessly at Romano Corporation, where both women intern. Kevin, meanwhile, grovels between Stella and Elena, scheming to reclaim his old flame.At a company banquet, the truth explodes: Luca reveals himself as the Capo, and Elena as his Donna. Stella is arrested for kidnapping; her aunt is fired; Don Rossi collapses. A final assault by Elder Council gunmen, lured by Kevin, nearly destroys the family — but Luca arrives in time. In the end, he crowns Elena the absolute Donna of the empire.
