'The Strain' season 3 episode 9 spoilers: Hunters have one day to save the city from the strigois

(Facebook/TheStrainFX)The Strain

Prior to the finale, an intense episode 9 of "The Strain" season 3 titled "Do or Die" will put the fans at the edge of their seats.

It seems that there are no longer safe zones in the heart of New York City as the vampires have infiltrated the whole city. The synopsis confirms that "NYC is falling" and the promo video further provides details on why this is so.

The Big Apple is no longer safe as the teaser begins with a scene which appears to be set in a dark basement. Dr. Ephraim Goodweather/Eph (Corey Stoll) is shown telling his assistant and lover, Dutch Velders (Ruta Gedmintas), "We have company" when a strigoi suddenly shows up to attack them.

The plot intensifies as the promo clip progresses to a scene where the hunters are discussing the urgency of their mission, saying, "We've got one day, or maybe two, before the city falls."

The hunters are battling with time to come up with a scheme to stop the strigois from completely overtaking the city and the only solution points them to taking down the Master.

The synopsis for the upcoming episode also stressed this urgency. It says, "Eph and Dutch frantically race to finish their new device to stop the Master before the city is overrun. Justine (Samantha Mathis), Gus (Miguel Gomez), and Angel (Joaquin Cosio) fight in one last stand to stop the spreading virus."

It remains to be seen if the hunters will be able to beat the clock and save the city. The new episode is also expected to define the details of the new device the hunters are making.

Meanwhile, another plotline was unveiled in the synopsis. It was mentioned that "Palmer (Johnathan Hyde) extracts vengeance for past wrongs but may have crossed the line."

Episode 9 of "The Strain" season 3 will air on Sunday, Oct. 23 at 10 p.m. on FX.