In a secretive military base called Planks, remorseless alien hunter Lars finds himself in the midst of a viral outbreak. The military personnel at Planks are seen hastily cleaning an unknown viral contaminant which is suspected to be from another planet. The usually buzzing base now maintains an eerie quiet. Perched in an invisible spaceship above, Lars meticulously plans his mission, donned in his robot suit and equipped with advanced weaponry. Equipped with a sophisticated heads-up display revealing the presence of the humans below, Lars prepares to intervene.

Encountering soldiers guarding the entrance of the base, Lars strategically makes them unconscious and continues his stealth mission. He infiltrates deep into the base, deploying camouflaged drones to trace the viral contaminants. A shocking discovery awaits Lars - the contaminant is more potent than anticipated, and the workers are unknowingly carrying it. Undeterred, Lars quickly adapts his plan to contain the spread.

Simultaneously, a convoy of trucks carrying captured lifeforms known as 'viromorphs' is identified. Lars finds himself in a race against time as he carefully navigates through the base, incapacitating personnel without lethal force. He employs advanced technology to neatly erase evidence of an extraterrestrial encounter while ensuring the humans remain unharmed, save for their pride.

Lars' mission sees a sudden shift as three viromorphs break loose and attack. Displaying swift agility and combat efficiency, Lars fights off the beasts, capturing one alive - for study. With his task completed, Lars vanishes into the night, leaving behind a legacy of the unfathomable power of alien technology.

The story takes a cliff-hanger turn when Lars contemplates his next move. Meanwhile, in an underground installation, the humans realize they are dealing with a problem beyond their understanding. The tale ends with Lars in his ship, cruising over the Swiss Alps, contemplating his next move while keeping an eye on multiple locations on Earth through his holographic screens.