Hsiung Ying-Ying, played by Megan Lai, is a newly elected legislator who campaigns to reject a bill backing a chemical plant in her hometown because it could potentially spread rabies to humans. Her fiery stance is tested when journalists aligned with the pro-construction faction push a narrative that sparks anger in her, and she lunges at a photographer in a moment of raw frustration. She is quickly restrained by a security guard who is secretly in love with her and has deliberately chosen to work at the congress to stay close to her, Wang You-Wei, and in the rush of the moment, Hsiung suplexes him. The incident sets off a chain of political and personal upheavals that redraw the lines of loyalty inside the Legislative Yuan.
Li Kuo-Chung, the leader of the pro-construction legislators, uses the confrontation to publicly condemn Hsiung, forcing her resignation. Blaming Wang for her downfall, Hsiung pressures him to run for office in her stead and reclaim her seat. Wang You-Wei, whose popularity surges online as a symbol of standing up to incompetent politicians, wins the election, earning the title of a national hero in the process. Yet his triumph proves fragile: at a pivotal press conference, he announces his support for the construction bill, revealing a calculated plan to infiltrate Li’s faction from within and sabotage their efforts to push the project forward.
As the day arrives for the president to be questioned by lawmakers in the Legislative Yuan, Hsiung encounters her father, a handyman who harbors a dangerous plan to kill the president outside the building. She rebukes him, but the encounter rekindles an old connection. The father then meets an acquaintance, Wang Feng-Hua, an encounter that threads through the story and adds a personal layer to the unfolding crisis. The two—who once shared a romance years ago—find a storage room inside the building where they briefly reconnect. Meanwhile, Hsiung infiltrates the conference center as Wang’s assistant, communicating instructions to him via an earpiece, weaving personal and political stakes together.
When the hearing commences, Li’s faction seals the doors before the vote, trapping everyone inside as the president, who had previously visited the chemical plant, becomes infected with rabies and mutates into a zombie. Panic erupts as politicians and journalists scramble to escape, but the heavily guarded doors hold fast, forcing the survivors into a deadly standstill.
From a balcony vantage, Hsiung lowers her jacket to shield Wang, with her father and Feng-hua nearby after their earlier meeting. The group confronts Li’s faction, who slip away through a passage from another meeting room. Li notices a wound on Wang’s arm and makes a bid to finish him off, but Hsiung defends him, insisting that rabies-infected individuals would show red eyes, while Wang’s gaze remains steady and unaltered.
As the undead breach the room, the crowd fights back with a mix of fear and resolve. A pivotal moment occurs when Wang’s blood splatters onto a zombie, causing the creature to burn and revealing that his blood is immune to the infection. Ku, the security guard, does what he can to shepherd everyone toward safety, but the doors stay locked. Li proposes a desperate escape through another passage to the outside, yet the key is held by the legislative president, complicating any immediate exit.
The group fights their way back into the central area, and Li manages to seize the key only to betray Wang, drawing his blood to sell as a vaccine before slipping away through the passage alone. In a self-sacrificing move to buy time for the others, Hsiung’s father gives his life, allowing the remaining survivors to slip out just as the doors crumble under the encroaching hordes. In the bathroom, they again cross paths with Li, who has injected himself with the vaccine and mutated into a new threat. The four unite to defeat him, ultimately ending Li’s threat.
Feng-hua, having lost hope after the death of Hsiung’s father, volunteers to delay the advancing zombies, buying precious minutes for Hsiung, Wang, and Ku to escape through a window to safety. With most politicians dead and the country gearing toward a massive reelection, Wang tells Hsiung that he will not run again, but she refuses his withdrawal and asserts their bond with a kiss, strengthening their personal commitment amid the chaos.
The story closes on a tense note as Wang faces another gangster-politician who resembles Li and confronts him with the burden of what lies ahead in the Legislative Yuan, reminding viewers that the cycle of power, loyalty, and peril continues even after the crisis subsides.