When Nini gets her hands on what she thinks is a pebble, she decides to keep it and forgets about it. Little did she know it was actually a priceless rough diamond that belongs to a big mafia boss. When she starts being chased by those who are after the diamond, the only person who can protect her is Nakan, the man who broke her heart three years ago.

Nakan's case requires a believable decoy, so he and Nini must team up. Their relationship is supposed to end when the case is closed, but Nini has a few tricks to pull.

本劇描述40代女性與初戀重逢之後發生的一系列愛情故事。

頂級飯店The Secret Hotel即將舉行海歸精英具海永（真理翰飾）和化妝品千金鄭秀雅（河戀姝飾）的婚禮，然而婚禮現場的天花板卻掉下一具屍體，導致婚禮不得被延期；策劃這場婚禮的酒店婚禮策劃部經理南相孝（劉寅娜飾）驚訝的發現，新郎竟然是自己的前夫。南相孝正和酒店理事趙成謙（南宮珉飾）產生曖昧關係，另外重逢前妻的具海永更是後悔以前發生的事想要重新跟南相孝在一起。徘徊在曖昧男和前夫之間的南相孝到底該選擇誰？另一邊，酒店的懸疑殺人事件的調查持續進行中……