The Othryos Descent

When independent demolition specialist Kalliades takes a contract to scuttle the massive, deep-water salvage rig Kymatothia, it seems like a standard hazard job. The rig is isolated above a treacherous sub-surface trench, and the company wants the deteriorating structure gone. But Kalliades bears an ancient oceanic mark on his skin—a trait that makes him uniquely capable of surviving the crushing depths, and precisely what the anomaly beneath the rig is hunting. After a catastrophic structural failure, Kalliades wakes up three days in the past. Now trapped in a repeating time loop, he must use his structural expertise and precise application of explosives to reverse-engineer the disaster, navigate a paranoid crew, and outwit whatever is systematically dismantling the rig from the abyss.