In this chilling tale, a retired miner shares his harrowing experience of surviving a devastating mine collapse. Trapped deep underground with no one else in sight, he begins hearing mysterious knocking sounds echoing through the dark, abandoned tunnels. With no other options, he follows the eerie sounds deeper into the earth, hoping for an escape. But what he discovers is far more terrifying than the collapse itself—a secret that has been waiting to be unearthed for centuries. Told by Terri Lynne Hudson.