To be in the king's company is tantamount to living with a tiger. One day, Ling Su'er saved the Crown Prince who got comatose due to serious injury in the forest. As she needed the Crown Prince's help on another issue, Ling Su'er was willing to protect him from being killed by other princes. But everything is not that peaceful. Harem fight, revenge and throne contending take place one after another. After experiencing these, can Ling Su'er keep innocent? Suffering the cheating and harm, will Ling Su'er feel regretful that she saved the Crown Prince because of her kindness... It's never unnecessary to be careful in the palace. Who's the final winner?