Unidentifiable fire monsters show up in the city
Stress Killer hits stores and people turn to the new stress-relieving beverage. Before long, it becomes an everyday drink people can’t live without. Then one day, a burning monster shows up in the city and destroys everything in its path. Not even water can put it out. Overnight, Rocky loses his job due to the fire monster, and people live in growing fear, not knowing when it will appear again.
Three friends make Stress Zero to fight fire monsters
Calling each other by childhood nicknames, Rocky, Ostrich and Dr. Go are close friends who hang out at Dr. Go’s food truck. They get together to taste Stress Zero, a wanna-be Stress Killer drink invented by Dr. Go, when a mini fire monster comes at them. Thinking on his feet, Rocky sprays Stress Zero at the burning creature and discovers a way to snuff it out. Rocky convinces the guys to face the monsters together, and the three musketeers destroy them one by one.
Rocky’s sacrifice stops the giant fire monster and saves the city
Meanwhile, Dr. Han Junsoo discovers that the fire monsters are actually people who are addicted to his drink, Stress Killer. Chairman Cheon of Company S tries to finish him off and hide the truth. To save himself, Dr. Han chugs down Stress Killer and turns into a giant burning monster. To everyone’s dismay, the monster’s sheer size and strength is no match for the three musketeers. General Choi, blinded by ego, steps up at this chance to attack the fire monster with fighter jets. But even his missiles prove powerless and the city is in greater danger. To save his family and friends, Rocky takes Stress Zero explosives and enters the mouth of the monster. Inside, he finds the host, Dr. Han, and brings him to consciousness. By saving his life, Rocky defeats the giant fire monster.