You study at a well-known university in South Korea, Seoul National University. Where this university only accommodates many people with high social status. You are the daughter of a famous doctor both of your parents are doctors, your family owns the biggest hospital in Seoul so it's no wonder your family is so well-known and you study in the medical faculty. But inside there is a gang called 'Enigma' where 3 mysterious, cold and unattainable men are at university but many girls like them and as men always follow their style. Jaemin is the son of an exclusive boss who owns how many famous car companies. Meanwhile, Haechan is the son of a famous female musician and the son of an education minister. Meanwhile, Mark is the son of the owner of several of the largest companies in Korea. Haechan Jaemin and Mark. They have been friends since they were still in chillhood and the three of them are studying at the Law faculty, until now. Many people think The three of them are perfect men with abundant wealth without them realizing it, Jaemin, Haechan and Mark each have their own wounds that they got from their families, parents. Starting from pressure, betrayal or even a big fight. The three men were perfectly able to keep everything a secret from all eyes of the world. Meanwhile, you are an only daughter, your parents are very supportive of you, even though they are busy, they still make time for you.

This morning you just arrived at the university driven by your dad's personal driver, you just got out and closed the car door, you see 3 luxury cars passing by and parking in the special car park.