In this K drama, Na-na and Ru-mi were best friends five years ago. But they stopped seeing each other because of one incident. After that, Ru-mi became a famous CEO of a bar 'Number A' and Na-na became a head bartender of 'Bar XX'. Recently bar 'Number A' has a poor sales profit and Ru-mi is set out to look for a good bartender.

Bartender's number 1 rule is to keep customers' secrets. But Na-na cannot stand customers who confess that they are cheating behind their partners. The reason is because she had been cheated five years ago which left a big scar in her heart. She witnesses one of her customer cheating and she puts this on the public SNS. This brings bigger touble than she expected.

Na-na and Dan-hee are spendig time together in a pub when the bar suddenly closes for a while. Na-na sees the manly side of Dan-hee she had not realized when they were only working togerther as mere colleagues. She feels she is slightly fluttered by him. Ru-mi feels her boyfriend, Kyu-min, is cheating behind her with his colleague lawyer in the office.

After listening to the story of Na-na and Jung-deun, Ru-mi is certain that Kyu-min is cheating her. In front of Kyu-min, Ru-mi pretends that she does not know anything, but behind his back, she tries to find the proof of the cheating. SNS, apps, messengers... she tries all the digital tools to find the proof of cheating but fails. But one day, she succeeds finding the proof in the blackbox.

In this K drama / Korean show (Dubbed in Telugu) Ru-mi opens a popular cosmetic's launching party in order to promote 'Bar XX'. But the party manager is Tae-hyun, the man who ruined Na-na and Ru-mi's friendship five years ago. Ru-mi, no matter what, has to open this party successfully in order to meet her father's expectation but Na-na just cannot work with Tae-hyun.