An abandoned Soviet facility. A forgotten experiment. A past that refuses to stay buried.

When Yuri, Frank, and Alexei explore an abandoned facility, they uncover traces of Project Echo—a secret experiment whose consequences may not have ended with its creators.

As strange experiences blur the line between memory and reality, the boys must uncover the truth behind the facility before they lose their grip on what is real.

Some secrets refuse to stay buried. Some experiments never truly end.

**Residual** is a psychological science thriller about memory, fear, and the dangers of uncovering what was meant to remain forgotten.