Hong Kong socialite Shi Yuan is plotted against, accidentally stumbling into the arms of her brother's archenemy, Jing Zhao. After an out-of-control night, the two quickly enter a flash marriage. She only wants to hide the relationship, but he steps closer and closer, turning a contractual marriage into ultimate pampering. An ex returns, socialites provoke, and the sister-protecting maniac brother guards strictly. Shi Yuan originally thought this marriage started from an accident, until layer after layer of secrets are uncovered, and she discovers that the so-called overstepping heartbeat was nothing more than Jing Zhao's long-plotted deep love.