A murder occurred in dormitory 444. The mistress died tragically, and then someone else died violently. The boss and Si'er knew that this must be related to Erbing, but Erbian deliberately stopped interacting with them the day after the incident, leaving the boss and Si'er clueless. Fortunately, Si'er's magic stick, Fifth Uncle, helped, and the truth finally came out. But the initial cause of all the incidents was society's discrimination and exclusion of gays, and the injustice that took their lives was the tragedy of a pair of lovers separated by yin and yang.
After experiencing life and death together, the eldest brother and the fourth child finally cleared the air and their feelings for each other gradually became clear. The two of them fell in love bravely, and they fulfilled the underground man's dream.