Gary Love makes his feature debut with the urban thriller based on co-screenwriter Dominic Leyton's play Collision.
Ashley Walters, Andy Serkis and Steven Macintosh star.
Arvind Ethan David, Rachel Connors and Michael Riley of Slingshot produced with Matthew Justice of Lunar Films and Oliver Milburn and Ben Dixon of Wolf Committee.
Moviehouse co-managing director Mark Vennis said: 'It's a great UK film featuring a trio of superb performances including a truly chilling turn from Andy Serkis. We're really excited about bringing it to the international market'.
Arvind David, Slingshot's co-founder and CEO, added: 'Moviehouse had both passion for the movie and a smart sales strategy that convinced us and our partners that they were the perfect fit.'
Slingshot aims to finance and produce a slate of 10 low-budget features over the next three years. Slingshot's second feature, French Film, is being sold by The Works International.