The main cast of 'Blazing Sonata's Japanese showings include Super Junior's Ryeowook, cast in his first musical since being discharged from the military, as well as Kim Ji Chul, VIXX's Ken, Cross Gene's Shin, Lee Ji Hoon, and Lee Sun Geun. The story revolves around a classical composer who witnesses a murder one day, and ever since that fateful day, he realizes that committing murder allows him to compose better and better masterpieces.