On the eve of Scarlet Stone’s wedding to billionaire Jacob Gray, her sister, Serena Stone, takes her to a nightclub. The two swap clothes and rings for fun, but tragedy strikes when they both get into a devastating car accident. Based on their outfits, Jacob mistakenly believes Serena is Scarlet. Seizing the chance, Serena undergoes surgery to take her sister’s place. As time passes, Jacob unknowingly falls for his "sister-in-law" Scarlet…