Devil's | Pass

Traces of radioactivity were found on their clothing.

Official investigations at the time attributed the deaths to an "unknown compelling force". Movie Plot & Theories Devil's Pass

In the film, the modern investigators use a university grant to retrace the original route. While they initially look for logical explanations like hypothermia, they soon encounter strange phenomena that suggest they aren't alone. [REVIEW] 'Devil's Pass' (2013) Ruins Its Own Potential Traces of radioactivity were found on their clothing