Stillwater

Stillwater – Down-on-his-luck Daniel receives a letter informing him of a great-grand-aunt passing and leaving him something in her will. So he heads out to the small town where she lived: Stillwater. Except it’s a small town with a secret: something happened there many years ago and the town’s inhabitants stopped physically aging and can’t die, so long as they stay within the town limits. Any injuries they have get healed super-quick, Wolverine-style. And now that Daniel knows the town’s secret, he can never leave.

A genuinely horrific concept.