Told in real-time through the lens of a cult-favorite late-night AM radio show, the series follows a host (played by Ethan) whose eerie, conspiracy-themed call-in program takes a chilling turn. One night, he receives a call from a man claiming to be part of a secret U.S. space mission lost to history—just the first thread in a sprawling web of government cover-ups, interdimensional breaches, and psychological warfare.

As the broadcast unfolds, strange signals hidden in the radio static reveal themselves. With each episode building on the last, one question grows more urgent—who, or what, is really on the other end of the line? And what do they want?

Created and co-written by Scott Derrickson and C. Robert Cargill and produced by Under The Influence Productions (founded by Ethan Hawke and his wife, Ryan Hawke), Crooked Highway and Mickey Schiff in collaboration with iHeartPodcasts.