High schooler Mackenzie Carpenter thinks her biggest problem is dying of boredom in the bucolic wasteland of Orange County... until her classmates start dying of massive blood loss, and Horny The Clown, the mascot for local burger favorite HELLA-BURGER, begins madly stalking her with cryptic messages hidden in 70's kitsch toys. It isn't until Mac discovers her unbelievable connection to Horny and his victims that she realizes, if she's going to live to see 18, she must come face-to-face with the killer clown in the bloodiest week Blanca Carne, California, has ever known.