Before The Flood
Jack, Irina, Nadia, Vaughn and Sydney land
in the city of Sovogda. They walk through a deserted street littered with
corpses and burning cars. As they wait for the Department of Special Research
team, they speak to Marshall and Weiss, who report that Director Chase is trying
to convince the Russians to call off the air strike.
At APO, Marshall and Weiss use the Blackwell Index to blackmail a Russian
minister into giving them the access code to a Russian satellite. They soon
discover that Elena is uplinking to the Russian network.
Syd follows a DSR signal, which leads to a severed arm. Suddenly, a CIA agent
named Brodien emerges from the shadows and tells them that his DSR team was
ambushed by the infected mob, which has left thousands dead. He reminds them
that the Rambaldi device is broadcasting a subaudible frequency that
physiologically alters people who drink the water. The symptoms, he says, are
irreversible.
He also says the epicenter is located over the Oransky building, and that while
he has taken out the city's power grid, the device is still running. Irina
suggests that it has been modified to run using an internal energy source. They
decide to take the subway, as it is the quickest way to the building.
Elena learns of the APO team's arrival. When Sloane volunteers to lead the
assault team, Elena tells him to bring Nadia back and give her the option to
join them.
As the APO team approaches the subway tunnel, an infected man impales Brodien
with a rod. As Jack, Vaughn and Irina try to start the train's emergency battery
system, Syd and Nadia go inside the train's switching room to force the train to
stop at the Oransky building. Irina urges Vaughn to tell Syd "the truth."
Syd tells Nadia that Vaughn asked her to marry him. Nadia and Sydney split up to
manually adjust the switches.
Sydney returns to the train first while Nadia, down the tracks, flips the switch.
The train rolls down the tracks as a mob chases Nadia. Jack refuses to stop the
train because if he does, it won't start again. Sydney stretches to pull Nadia
to the train but she's tackled by an infected madman. Irina tells Syd that Nadia
is still alive.
Sloane kills Elena's men and waits at the station. He tells them that Elena has
primed the world's drinking water. As Syd voices her suspicions, Sloane says he
allied himself with Elena to put an end to this himself, but Elena built in a
security device that Sloane couldn't crack. Jack punches Sloane and takes
control of the team.
Marshall reports that Elena is going to use the Russian satellite to distribute
the Rambaldi frequency worldwide. Once it goes online, the Rambaldi signal will
be broadcast and everyone will be infected. Irina says they need to shut down
the device from the roof of the building.
Jack tells Sloane to take them to Elena. Sloane cautions that once they disable
the device, the toxins will dissipate in the atmosphere and the person who
disarms it will only have a few seconds to run. When Irina insists that she can
cut the wire and reverse ionization, Sloane reveals that Elena had changed the
wiring scheme as a fail-safe. Irina orders him to take her to Elena so she can
force her to reveal information while Syd disarms the bomb.
Nadia fends off the mob and wanders the streets. She approaches a wounded man
who surprisingly holds a gun to her head and takes her to Elena. When she
refuses to join Elena, Elena injects her with the contaminated water.
Before Syd heads out to the rooftop to disarm the bomb, she turns to Vaughn and
says, "Just in case: yes, I'm gonna marry you." She wears his ring and
hops into the elevator.
Marshall tries to connect to the satellite. Weiss says the President and his
Cabinet are being evacuated to secret bunkers.
Sloane arrives with Vaughn, Irina and Jack. Vaughn searches for the relay room.
They strap Elena to a chair.
Sydney reaches the rooftop and opens a hatch that revealed hundreds of
interwoven wires. Nadia, now infected by the device, walks toward Sydney. Jack
and Irina urge a reluctant Syd to take her out. The sisters battle. Vaughn blows
the relay but nothing happens. Irina tells him to get to the roof. Sydney knocks
Nadia out and chains her up.
Vaughn arrives on the roof and realizes that Sloane is not there. Meanwhile,
Irina guides Sydney in disarming the device. Irina gives her sister a chance to
help them as Jack gets ready to torture Elena. When Jack pierces her with a
syringe, Elena yells that Sydney should cut the white wire. Irina shoots Elena
in the head and tells Syd to cut the blue wire instead and run fast -- she only
has 15 seconds.
Sydney is about to cut the wire when Nadia strangles her from behind with the
chain. As Sydney starts to suffocate, Sloane arrives and shoots Nadia. Syd sees
Vaughn and tells him to take the wounded Nadia with them. Syd then cuts the blue
wire and runs away as the device starts to fall apart. They race inside the
quaking building and sprints toward a shelter -- they have just saved the world.
Jack advises Irina, who is wanted by the CIA, to disappear. They kiss. Irina
tells Syd that she's proud of her. She says that Syd may not see her on her
wedding day, but she'll see Syd.
Later, Syd visits Sloane in a jail cell, tells him that Nadia is stable, but
they're still trying to find an antidote. The Russian military executed all
survivors to support their claim that it was a chemical explosion. Sydney has
arranged for Sloane to see Nadia. She believes he was trying to do the right
thing. Sloane thanks her.
Driving in Santa Barbara, Syd suggests to Vaughn that they blow off the big
wedding and elope. After professing their love, Vaughn reveals that that he was
a bad guy before they met. He continues to say that to begin with, his name is
not Michael Vaughn. Before Sydney can react, a car collides with theirs.