A psychology student in the 21st century, time travels and becomes a concubine in a big family. Before her sisters competed for favor, and later she was surrounded by her aunt and aunt. Once married as a flat wife, the main wife is the elder sister. She just wants to stay by herself Live a quiet life in the small courtyard, but the reality does not allow it. The sister-in-law who likes to make trouble, the mother-in-law who strictly abides by ancient rules, the stern and resolute husband who does not understand customs, the concubine who is eyeing ulterior motives, the gloomy stepson, Sisters who have their own schemes and have no sincerity. In the hard work of planning, she is just a concubine who comes from a humble background and wants to seek a little peace. Conspiracy is full of schemes, parents have short-term relationships, and interpersonal relationships.