A sci-fi action film directed by Joseph Kosinski (in his feature directorial debut) & written by Adam Horowitz & Edward Kitsis, from a story by Horowitz, Kitsis, Brian Klugman, & Lee Sternthal. It serves as a sequel to Tron (1982). The cast includes Jeff Bridges & Bruce Boxleitner reprising their roles as Kevin Flynn & Alan Bradley as well as Garrett Hedlund, Olivia Wilde, James Frain, Beau Garrett & Michael Sheen. The story follows Flynn's adult son Sam, who responds to a message from his long-lost father & is transported into a virtual reality called "the Grid," where Sam, his father, & the algorithm Quorra must stop the malevolent program Clu from invading the real world. With Steven Lisberger as director, Klugman & Sternthal as writers, Kosinski was recruited as director two years later. As he was not optimistic about Disneys Matrix-esque approach to the film, Kosinski filmed a high-concept, which he used to conceptualise the universe of Tron: Legacy & convince the studio to greenlight the film. Principal photography took place in Vancouver over 67 days, in & around the citys central business district. Most sequences were shot in 3D & ten companies were involved with the extensive visual effects work. Chroma keying & other techniques were used to allow more freedom in creating effects. Daft Punk composed the musical score, incorporating orchestral sounds with their trademark electronic music. In 1989, Kevin Flynn, who was promoted to CEO of ENCOM International seven years earlier,[N 1] disappears. Twenty years later, his son Sam, now ENCOM's primary shareholder, pranks the corporation by releasing the company's signature operating system online for free. ENCOM executive Alan Bradley, Flynn's old friend, approves of this, believing it aligns with Flynn's ideals of open software. Nonetheless, Sam is arrested for trespassing. Alan posts bail for Sam & tells him of a pager message originating from Flynn's shuttered video arcade. There Sam discovers a hidden basement with a large computer & laser, which suddenly digitizes & downloads him into the Grid, a virtual reality created by Flynn. He is captured & sent to "the Games", where he must fight a masked program named Rinzler. When Sam is injured & bleeds, Rinzler realizes Sam is human, or a "User". He takes Sam to Clu, the Grid's corrupt ruling program, who resembles a young Kevin. Clu nearly kills Sam in a Light Cycle match, but Sam is rescued by Quorra an "apprentice" of Flynn, who shows him Flynn's hideout outside Clu's territory. Flynn explains that he had been working to create a "perfect" computer system, & had appointed Clu & security program Tron as its co-creators. The trio discovered a species of naturally occurring "isomorphic algorithms" (ISOs), with the potential to resolve various natural mysteries. Clu, considering them an aberration, betrayed Flynn, killed Tron, & destroyed the ISOs. The "Portal" permitting travel between the two worlds closed, leaving Flynn trapped in the system. Clu sent the message to Alan hoping to lure him into the Grid (though Sam serves his purpose just as well) & reopen the Portal for a limited time. Since Flynn's "identity disc" is the master key to the Grid & the only way to traverse the Portal, Clu expects Sam to bring Flynn to the Portal so he can take Flynn's disc, go through the Portal himself, & impose his idea of perfection on the human world. Against his father's wishes, Sam returns to Clu's territory to find Zuse, a program who can provide safe passage to the Portal. At the End of Line Club, the owner reveals himself to be Zuse, then betrays Sam to Clu's guards. In the resulting fight, Flynn rescues his son, but Quorra is injured & Zuse gains possession of Flynn's disc. Zuse attempts to bargain with Clu over the disc, but Clu betrays him & destroys the club along with Zuse. Flynn & Sam stow away aboard a "Solar Sailer" transport program, where Kevin restores Quorra & reveals her to be the last surviving ISO. The transport is intercepted by Clu's warship. As a diversion, Quorra allows herself to be captured by Rinzler, whom Flynn recognizes as Tron, not killed by Clu but rather reprogrammed. Sam reclaims Flynn's disc & rescues Quorra, while Flynn takes control of a Light Fighter. Clu, Rinzler, & several guards pursue the trio in Light Jets. Rinzler remembers his past as Tron & deliberately collides with Clu's Light Jet, then falls into the Sea of Simulation below. Clu confronts the others at the Portal, where Flynn reintegrates with his digital duplicate, destroying Clu along with himself, while Quorra - having switched discs with Flynn - gives Flynn's disc to Sam & they escape together to the real world as the resulting explosion levels the Sea of Simulation. In Flynn's arcade, Sam backs up & deactivates the system. He then tells a waiting Alan that he plans to retake control of ENCOM, naming Alan chairman of the board. Sam departs on his motorcycle with Quorra, & she witnesses her first real sunrise.