Watch Insidious: Chapter 3 (2015) HD Full Movie Free on SolarMovie. Watch Insidious: Chapter 3 (2015) online free. A prequel set before the haunting of the Lambert family that reveals how gifted psychic Elise Rainie...A prequel set before the haunting of the Lambert family that reveals how gifted psychic Elise Rainier reluctantly agrees to use her ability to contact the dead in order to help a teenage girl who has been targeted by a dangerous supernatural entity.