On the eve of their wedding, Su Wanning lets her male best friend Miles Gray sleep in the master bedroom. Her fiance Ethan Carter can no longer tolerate it, calls off their seven-year relationship at the wedding, settles all shared finances and walks away. Su Wanning later discovers Miles only used her for a bet, and is filled with regret. Ethan Carter renovates his house, meets interior designer Lin Zhihe, and finally finds his right match.