Baek Do-ha, the ace of Kwangsoo University, has been focusing on a serial murder case called the 'Ribbon Murder Case'. He suspects Choi Joohyuk, the CEO of 'JH Group', but even the police cannot be reckless with him, because he holds great power in politics and business. Baek Doha, feeling frustrated by this, approaches Choi Joohyuk all alone, but he develops a crush on him, and starts to not even suspect him. Eventually, he spends the night drinking with him, and the next day, he encounters a truth he doesn't want to believe.