A passionate fan who went back in time to save his favorite top star Ryu Sun Jae.Ren Sui, who gave up on his dream due to an accident when he was a child, found great comfort after accidentally hearing Yoo Sun Jae's songs on the radio and became his fan.One day as peaceful as usual, Liu Shanzai sadly passed away, and Ren Sui accidentally returned to 15 years ago.Facing high school student Yoo Sun Jae, Ren Sol fights alone to prevent future tragedies.