After modern corporate worker Song Qingran time-travels, she binds with a slack-off system and signs a three-year contract to act as the outer concubine of Xuanwu Prince Ning Zhuo, aiming solely to lie flat and amass wealth. Outwardly she appears gentle and tender, but her heart is full of scheming complaints, and the cold-faced God of War Ning Zhuo happens to be able to hear all her inner thoughts. The heroine takes the opportunity to build her career, invites the grand princess to establish a beauty boy band, and helps her father win top rank in the imperial examinations. Ning Zhuo sees through her little schemes and has already fallen in love; while exposing her plots, he pampers her with all his might. When the contract expires, Song Qingran intends to slip away, but the prince refuses to let go. Her father's background is mysterious, and the old affair of the Northern Qi chancellor stirs up perilous royal court intrigues.