Xiang Zheng Yang and Shu Xin Kui meet by accident when he takes her cup of coffee at a cafe. Later that day the two encounter each other again at a singles party that their friends dragged them to. After that faithful day the two embark on a whirlwind romance and decided to get married after only dating for a few months. After their flash marriage the two starts to see faults in each other and find each other annoying. She sees him as a controlling neat freak who has a love for amphibians . While he sees her as a messy clumsy oath who pigs out on junk food. Unable to cope with each other anymore the two agree to a divorce after six month of marriage.
On the day Zheng Yang and Xin Kui divorce is finalized and they divide their assets, the two have a huge fight over belongings. The two swear not to ever encounter each other again. While at the beach reminiscing of the good times he had with Xin Kui, Zheng Yang sees a women about to drown and saves her. Ge Qian Qian has also just ended a relationship. After a few kind words about relationship issues from Zheng Yang at the hospital the two part ways.
Four years later fate brings Zheng Yang and Xin Kui back together, when their best friends who dragged them to the singles party, get married and ask them to be the best man and maid of honor at their wedding. The day after their friends wedding, both also find out they're candidates at the same "Mars Hotel" management training course, which is a job promotion for those who survive and passes the training course. Also a trainee at the same course is Qian Qian, the women Zheng Yang saved from drowning four years ago. Things get more complicated when the strict director of the training course is Ji Shi Yu, Qian Qian's former fiancee who she ran out on four years ago without giving any explanation.
Shi Yu is the stern supervisor who believes the guest at the hotel are always right even though they are not. He tells his trainees that no matter what the guest must always leave "Mars Hotel" feeling satisfy with the best hospitality provided to them. He acts cold towards Qian Qian because of how she ended their relationship, but deep down he still cares for her and wants to know the reason she had left him. Qian Qian truly loves Shi Yu and was set to marry him four years ago until she found out she could not fulfill his dream of having lots of children since her doctor told her she could never have a child.
After working closely together Zheng Yang and Xin Kui learn more about each other that they didn't know about before. The two decide to give their relationship another try but with Zheng Yang's family business in financial troubles and with his mother still disapproving Xin Kui, it puts a strain on their relationship from going forward.