Lu Shu appears to be the model college student: diligent, bookish, and humble. When a reporter interviews him about his inspiring winter break, he vaguely mentions doing manual labor to save for tuition. The truth, however, is far more explosive.

Instead of construction work, Lu Shu spent his break working as a high-ranking mercenary and assassin in war-torn foreign zones, earning a terrifying reputation on the global Dark Web bounty list. His cover blows when a massive SWAT team storms his university classroom to arrest him, shocking his classmates and the live-streaming nation. Calmly escorted away by armed officers, Lu Shu faces interrogation about his overseas activities, including his preference for AK-47s.

As authorities struggle to comprehend how a seemingly ordinary student became an international legend of violence, Lu Shu maintains his nonchalant demeanor, ready to explain why his 'part-time job' involved more than just digging holes. This urban comedy blends high-stakes action with absurd misunderstandings as the world's deadliest killer tries to finish his degree.