“Am I a good person?” asks middle management, middle-aged family man Thomas (Freddie Prinze Jr.) of himself in a mirror. Well, earlier that day, he’d been enjoying himself with mistress Hannah (Gabrielle Haugh) right up to the point where she died in his pool and he subsequently had to hide the body. Given that information, you can make up your own mind as to just how good a person Thomas is. Any scheme to get rid of the aforementioned corpse, however, is thrown into turmoil as a load of folks show up at the house unannounced for his surprise birthday party and it seems that almost everyone has something to hide, even if it’s not a recently deceased bit on the side.

If Dakota Gorman’s thriller sounds a touch ludicrous, you would not be wrong. From the start, Thomas acts so weird it’s amazing that no...