Soon after, the final events of Half-Life 2, as well as the chapters Undue Alarm and Direct Intervention of Episode One, come to pass, and the Citadel's dark energy reactor begins to enter meltdown. She starts to weep, because she hadn't been 'given a gift in over a decade.' Sometime later, David gives Julia a present: a 9mm pistol with the slogan 'Never Gone' written on the side. At one point in the film, they kiss in an abandoned restroom after destroying a Combine Strider. At first, she doesn't trust him, but after partnering up together to survive the battle, they become closer to each other. During the battle for City 17, a Russian Resistance member (Julia Tourianski) is about to be killed by CP officers when the third Resistance member (David Purchase), who was only heard in a radio transmission during Part One, saves her by killing the officers. Part Two begins some time before Part One, taking place somewhere before the chapter Anticitizen One during the final events of Half-Life 2. The duo disappear behind a cloud of dirt from the wake of the chopper's mounted gun, and the film abruptly cuts to black. They are eventually caught upon an open stretch of railway, where a Hunter-Chopper appears and fires at them, giving chase. The two retaliate with their own weaponry (Derek using a 9mm pistol, then a crowbar found hanging on a handrail Ian using an SMG with a grenade launcher) and manage to escape. Suddenly, CP officers appear and fire on the Resistance members. After a brief argument, the two resolve to escape City 17 before 'the Citadel blows us up first'. Through radio communication, the two learn from a third rebel (David Purchase) that the last evacuation train has already left, and are urged to escape the city on foot through the canal system (a route similar to that of Gordon Freeman's in Half-Life 2) in order to catch up with David, who is en route to the Resistance stronghold of White Forest. Two male Resistance members (Derek Chan and Ian Purchase) are introduced escaping through an overrun trainyard. CP officers are also seen executing captured rebels, while Combine synths wreak havoc on the warzone. Members of the Lambda Resistance are seen fighting their way out of the city as the Combine's Civil Protection forces try to hold them back. Prior to the film's events, Gordon Freeman's actions within the Citadel have held down the impending explosion, opening a small window of time for civilians to escape.

Isaac Kleiner is making his 'Kleinercasts' on City 17's PA system, warning that the Combine Citadel is set to explode at any moment should the Citadel detonate, the resulting explosion will destroy the city and the surrounding area. Part One is set during the second half of events of Half-Life 2: Episode One.

Half life 2 rebels