Kang Hyun-yul, the right-hand man of Jung Do-jin, the boss of the Jindo dog sect, was once a feared delinquent.However, after a fight, Zheng Daozhen was arrested and taken to the police station. Xianlu decided to wash his hands and start a new life.He joined the Watermelon Sugar Band as the bassist, trying to find his way through music.However, Zheng Daozhen believed that Xianlu had betrayed him and planned to seek revenge on him after he was released from prison.

Hyun Yool's new life is not all smooth sailing.Ha Li Chan, a band member, was injured by a street gangster.Xian Lu saw all this and couldn't sit idly by. He found those gangsters and gave them a severe lesson. At the same time, he also rescued a student from Peiyuan High School.Although the gangster warned him that Jung Do-jin was about to be released from prison, Hyun-yul did not back down.

After the Watermelon Sugar band was officially established, they adopted the pattern drawn by Qing Ya as the group uniform, and Eunyou served as the photographer.The school anniversary is coming soon, and the band members are looking forward to showing off their skills. They also hope to subsidize the band's expenses by selling band peripherals.Eun-jae, the handsome member of the band, becomes the target of female fans.However, Enyou was a little jealous because she found that Enjie couldn't stand anything spicy, which made her suspect that Enjie was not her mother's first love.

Wu Mazhou told everyone that there will be a school anniversary rehearsal in the gymnasium at three o'clock tomorrow afternoon.It's a big day for the band, but Enjie has a premonition that something bad is going to happen.He had seen Yin Dongjin's interview and knew that the band had an accident during rehearsals, which eventually led to the band's disbandment.Therefore, he begged Ha Li Can not to participate in tomorrow's rehearsal, but Ha Li Can did not listen to his advice.In desperation, Enjie had to ask Eunyou for help.Eunyou agreed to help Eunjie, but put forward two conditions: first, Eunjie must tell her the reason, and secondly, Eunyou must accompany her to watch a movie after the event is completed.Enjie agreed without hesitation.

However, things did not develop as Enjie expected.Ha Lican was woken up by Eunyou's phone ringing, and Eunyou wanted to take a makeup photo of him again.Heli Can came to the island that Enyou mentioned, but instead of waiting for Enyou, he waited for Enjie.Enjie told him that Eunyou would not come, and he asked her to make the call, with the purpose of preventing Ha Lican from participating in the afternoon rehearsal.Ha Li Can didn't understand why and turned around to leave, but En Jie forced him to jump into the sea. In the end, Ha Li Can had to give up the idea of ​​returning and rescued En Jie.

On the other side, the band members were worried when they discovered that Ha Li Chan and Eun Jie were missing.However, when Ha Li Chan and Eun Jie came back, no one blamed them.Instead, grandma asked Ha Li Can to help deliver food to Xiubin. When everyone learned that Xiubin worked as a security guard at Peiyuan Middle School, they immediately had an idea, so they took grandma's dumplings to the school in exchange for the opportunity to continue the rehearsal at night.

However, Jung Do-jin did not give up his plan to take revenge on Hyun-yul.He threatened Kang Hoon, who was saved by Hyun Yool, to destroy the light stand, almost injuring the band members.Although this plan did not achieve the expected results, Zheng Daozhen did not give up.He and his men came to the gym aggressively to settle accounts with Xian Lu, and the two sides started fighting.Enjie, who was preparing to watch a movie with Eunyou, heard that the band was rehearsing again. He had a premonition that something was wrong, so he got up and ran to the stadium.Although Hyun Yul and Ha Lee Chan were braver, they were unable to defeat the four-handed opponent with two fists. Zheng Dojin hit Ha Lee Chan on the head with a bat.Just when he swung the bat again to hit, Enjie arrived in time and kicked him down.Someone shouted that the police were coming, and the people hurriedly ran away.Eun-gyeol hugs Ha Li-can and regrets that he didn't protect him well.