The year is 1983. The Cold War is a fragile truce, shattered when a mysterious cosmic signal opens a gateway in the heart of the Washington wilderness. An elite US-Soviet joint unit is deployed to contain the horror: grotesque alien creatures, the Viridian Echoes, who use psychic invasion and a terrifying biological weapon, the Viridian Blight, to corrupt Earth's very soil.

As a planetary organism begins to take root, the soldiers descend into a claustrophobic battle against a monster that weaponizes their deepest fears and distrust. With their sanity fraying and the world's fragile peace at stake, they discover that to save humanity, they must make a harrowing sacrifice—shedding the very emotions that make them human.

The Echo Strain is a chilling Cold War thriller where a global crisis forces humanity to confront its inner darkness before it can face a monster from beyond.