Frailty

Frailty - in which Bill Paxton has two adorable sons, whom he tries to mold into monster fighters, or serial killers, depending on your position. So, Bill Paxton is a nice dad with two sons and no wife, and they have a nice house behind the town's rose garden. So, the trouble starts when Bill Paxton gets a clear message from God that he is being enlisted to slay demons, and his sons can help, too, the only catch is that the demons are inhabiting human bodies, and therefore it looks like he is murdering humans, but he is sure he is slaying demons. God gave him a magical pipe, a huge axe and some gloves as tools, and said when Paxton touches the bodies, their demon faces will be revealed. The oldest son has some understandable problems with digging graves in the aforementioned rose garden, but Paxton cannot abide his son's skepticism, and makes him dig what turns out to be a murder dungeon, in hopes of convincing him to pray. The poor kid cannot see these demons, and just sees his dad and little brother murdering humans, which is, understandably upsetting. The whole thing is a little ambiguous. So, the entire framework of this tale is told through the narration of Matthew McConaughey as the supposed older brother, Fenton, telling FBI guy Powers Boothe about where all these bodies are buried by his serial killer younger brother, who is killing people in a ritualistic fashion and the FBI are on the case! This is maybe the best twist in any movie ever: McConaughey is actually the younger brother who was helping his dad slay all those demons, and Fenton is the one who is the serial killer, which his father predicted, per God. Adam, the younger brother, was right all along and him and his dad had powers and were slaying demons, and when he found out his older brother was killing girls, he put him down like a dog and buried him in the rose garden too. Stupid Fenton killed their nice dad years ago when they were younger, when Paxton tried to make him slay a demon, but instead he buried the ax in his father's chest. Stop! He was doing the right thing! God really told him to! So, at the end of the movie, Adam knows that Powers Boothe killed his mom, and he slays him and buries him in the rose garden next to Fenton, and all the bodies he has put there over the years. He will never be caught, because he is doing the Lord's work.