Seventy-two hours into the global data collapse, civilian communications completely break down, and abnormal code pollution materializes into "Eclipse Shadows." They can replicate voiceprints and mimic human shapes, luring survivors to open doors before devouring their consciousness cores, turning the city into a data ruin. Maintenance intern Jiang Chen is trapped in a rented room surviving by a thread, when in a desperate situation he activates the "Emoji Data Defense Protocol," with daily refreshed emoji defense units each having their own shortboards. He leads this "unreliable" squad to outwit crisis, grows into the core commander, and ultimately joins hands with his former rival to seal the pollution matrix.