Highlander 2: Renegade Version is a "Director's Cut" of Highlander II: The Quickening, first released in 1995 on home video. A similar cut of the film was later released on DVD & Blu-ray as Highlander 2: Special Edition, with newly added special effects.
Highlander 2: The Quickening begins in 1999 when Connor solves the problem of a depleted ozone layer on the Earth by devising a giant shield around the entire planet. The earth is saved, except for the fact that it is now a continual 99 degrees, and the earth is plunged into 24 hours of darkness. 40 years later, Connor is an elderly man. Then there is a flashback of Connor recalling his halcyon days, Connor and Ramirez led a futile coup against the ruling dictator, Katana (Michael Ironside), that caused them to be banished.
Back in the present, Katana sends a pair of goons to kill Connor. When Connor lops off their heads, he is revitalized...and immortal. Just as he meets scientist, Louise Marcus (Virginia Madsen), who has discovered that the shield around the earth is no longer needed since the ozone layer has repaired itself. But, unfortunately, the shield is in overseen by an evil cartel who wants to control the Earth's resources. Connor and Louise team up to battle the cartel while Katana sends out more emissaries to get Connor.