Lin Xiao (played by Yang Mi), Gu Li (played by Guo Caijie), Nan Xiang (played by Guo Biting), and Tang Wanru (played by Xie Yilin), four good sisters who grew up together, graduated from college and entered the workplace, starting a new journey. Nan Xiang, who had originally left her sisters and was about to leave Shanghai with her fallen boyfriend Xi Cheng (played by Jiang Chao), returned to her sisters. Gu Li led everyone to move into a new villa, and everyone continued their utopian life under the same roof. Lin Xiao and Gu Li accompanied Gong Ming (played by Jin Rong) to participate in a fashion event in Rome, and also called Nan Xiang and Tang Wanru, and met Gu Li's mixed-race cousin Neil (played by Lee Hyun Jae) in Rome. However, when Lin Xiao returned to Shanghai, she received the sad news that her boyfriend Chongguang (played by Chen Xuedong) had a relapse of cancer and unfortunately passed away. A few months later, Lin Xiao, who finally cheered up and started a new life, met a foreign model Lu Shao (played by Chen Xuedong) who always reminded her of Chongguang inexplicably. At the same time, Gu Li's biological brother Gu Zhun (played by Ren Youming), whom she has never met, suddenly appears. He holds 20% of the hidden shares of the Gu family. He tells Gu Li that ME has a huge financial loophole. The two siblings join forces to take back Shenggu Company acquired by ME. Gu Li persuades the sisters to take advantage of Gong Ming's birthday and ME's anniversary to steal key documents from the Gong family's old house. Will everything go as they expected? The longest and most difficult night is quietly waiting for them...