Overview
Kill Theory is a 2009 horror-thriller film directed by Chris Moore in his directorial debut and written by Kelly C. Palmer.
Plot
An unnamed man is sitting in a psychiatrist's office, being released from an insane asylum. His doctor, Dr. Karl Truftin (Don McManus), recaps how the man sacrificed his three friends during a mountain climbing expedition, cutting their climbing ropes in order to save himself. Although the man insists that anyone in his situation would have made the decision to kill to survive, the doctor explains that due to good behaviour and evident remorse over causing the deaths, the man is to be set free with regular psychiatric evaluation.
Meanwhile, Brent (Teddy Dunn) is travelling to his father's lakehouse with his girlfriend Amber (Ryanne Duzich), other couples Michael (Patrick Flueger) and Jennifer (Agnes Bruckner), Carlos (Theo Rossi) and Nicole (Steffi Wickens), as well as their friend Freddy (Daniel Franzese). Upon arriving they are surprised to find Brent's step-sister Alex (Taryn Manning) has been living there. Brent and Alex argue, however the others convince Brent to let her stay. After settling in, Amber refers to an unspecified event that implies she and Michael were intimate at one point, however Michael brushes off the topic quickly. The group party and drink into the night until everyone goes to bed. Carlos and Nicole decide to sleep outside on the porch. Carlos, being heavily intoxicated, passes out immediately. When Nicole goes into the kitchen to get a drink, she is attacked by an unknown man.
From Wikipedia (CC BY-SA 4.0).