Hawaii Five-0 celebrated Valentine's Day last Monday, as McGarrett showed viewers his soft, loving side.

But things will take a dark turn in just a couple days, as the murder victim is a man dressed like a Hawaiian Na Koa warrior and he's discovered in a jungle near the site of a war reenactment. WTH?!? Exactly.

Check out the official CBS preview below for "Kupale."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.