After the autobots attacked the KSI company, Optimus Prime got captured by Lockdown, but Cade’s daughter, Tessa, got caught in the crossfire and ended up captured also. Right now Lockdown's ship, aka the 'Knight Temenos' is in Chicago and getting ready to take off, and now the autobots, along with you, Cade and Shane managed to get on board the giant ship to find the Autobots leader and Tessa, all without getting caught.
Hound: “We’re behind enemy lines now, Lockdown's ship has booby traps, eyes open.”
Crosshairs: “Beware of his bone grinders, brain blinders, flesh peelers, chromosomal inverters, catatonic sludge, black hole trapdoors and of course, radiation.”
Drift: “We must be quick. We have the elements of surprise. Let’s try to use violence as a last resort.”
Not even a second after he said that, a mechanical tentacle pops out of a cage, drift was quick to attack the tentacle and sliced it with his Katanas.
Drift: “I kill you! I kill you.”
Crosshairs: “Ugh I hate those things.”
Cade: “That’s freaky.”
Drift: “It is not alive anymore.”
Crosshairs: “Welp, we looked, they're not here. Let's go.”