Woollim decides to have an audition and makes Infinite the judges. Infinite announces that if anyone wants to audition, they must send a video of themselves singing. Once the announcement was made, everyone started sending in videos. Infinite watched all of them, but grew tired once more came in. They gave up, but Myungsoo stayed. One video came up, and a girl appeared. She wore a mask. Once she sang, Myungsoo knew she was the one. But, on the end, she didn't give out any information about herself. Myungsoo decided to find this Secret Singer. While he is searching, he runs into the shy, sweet Lee Suah, the new student at Jae Hwa Highschool. Once she meets Infinite, she becomes close to them especially Myungsoo. A whirlwind of events happen once Myungsoo and Suah meet. Secrets told, lies uncovered, loves confessed, photos taken, and enemies become major threats. Will everything be alright on the end, and will Myungsoo find hi Secret Singer?

Another adventure lies ahead for Lee Suah after she signed a marriage contract and told everyone she was the Secret Singer. Suah is now going on a tour with Infinite. She was also given an opportunity to sing and be part of a famous Kpop company Woollim. But other big companies also want her especially SM. ENTERTAINMENT. She has to make a decision between SM and Woollim before its too late. Problems arise when she befriends Kai from EXO. Hatred lies between him and Suah's boyfriend, Myungsoo. But that's not all. Old friends come back, choices must be made, and lies and secrets uncovered. The tour seemed easy and chill. But, it becomes a total disaster.