Yi Ran (Lu Yang Yang) struggles to make ends meet through working at a variety of odd jobs. While she's often frustrated with her life, she's found an outlet for her anger: leaving negative reviews when she's dissatisfied with a business. However, after she leaves a negative review at a hotel, the perfectionist hotel director and heir to the hotel group Xiao Mu Cheng (Xing Zhao Lin) tracks her down and asks her to help fix the hotel's problems by hiring her as a professional guest! Yi Ran agrees, beginning her work with Mu Cheng to address guest issues and other problems at the hotel. The two often clash due to their different backgrounds, but find themselves inexplicably drawn to each other in more ways than one.

Su Cheng Cheng (Wu Jia Yi), a brilliant young scientist, lives by strict scientific principles at a male-dominated university. When she meets fellow scientific prodigy Xiao Yu He (Liu Yi Chang), she experiences an unfamiliar emotion she believes is love. Together, they decide to scientifically study the phenomenon of love, analyzing brainwave patterns and heart rate data to understand their feelings. As they attempt to dissect love through a scientific lens, they wonder if emotions can truly be measured or if they will unexpectedly fall victim to the very phenomenon they are studying. Based on a manga series by Alfred Yamamoto, this is a 2023 Chinese drama series directed by Hao Fei Huan that explores the intersection of science and romance.