>The preview begins with cyber-enhanced warrior Grace (Mackenzie Davis) arriving from the future and landing in front of a young couple in Mexico City. The couples tries to help, believing her to be injured, only to be accosted by policemen who believe them to be assaulting Grace. When questioned, Grace swiftly dispatches the policemen to save the couple, but then proceeds to steal their car and man's clothes, leaving them stranded and bickering on the road.
>The next scene sees Grace and Dani Ramos (Natalia Reyes), a young auto-mechanic caught up in her mission, on a bridge, fleeing from the new Terminator (Gabriel Luna), who has the ability to split into two. He corners the duo, but before he can strike, Sarah Connor (Linda Hamilton) arrives in a fortified truck and blows him away with a bazooka. When Dani questions Grace about Sarah's identity, however, Grace has no idea who she is.
>A montage of action scenes follows, including a fully-human Grace fighting in the war-torn future, and culminating with Sarah and the T-800 (Arnold Schwarzenegger) back to back, firing at unseen enemies, before returning to the bridge, where Dani, Grace and Sarah flee from the Terminator. Sarah throws a grenade at him and returns for the truck, growling "I'll be back!"
>Set 25 years after TERMINATOR 2: JUDGEMENT DAY, the new movie reveals that although Sarah and her son John Connor prevented their particular version of Judgement Day, Skynet still manages to subjugate humanity under different circunstances, leading to a different "dark fate" where the Connors are no longer pivotal to humanity's survival. Although John has since died and this is no longer her story, Sarah joins forces with Grace, Dani, Dani's brother Miguel (Diego Boneta) and the T-800 to save mankind's future once again.