The Tron movie saga, including the original film, Tron: Legacy, and Tron: Ares, is a complex and intricate story. With a 15-year gap between the second and third films, audiences may need a refresher before watching the latest installment.
The Grid world of Tron is a complicated place, and prospective viewers might need to catch up on the story before buying a ticket. This explanation will cover the key points of all three films, excluding the events of Disney XD's Tron: Uprising, which takes place between Tron and Tron: Legacy.
Note that Tron: Uprising, although technically canon, was cancelled after a single season and its events will not be covered here.
Author's summary: Exploring the Tron movie saga in brief.