'The Originals’ Season 1 Episode 15 Spoilers: Klaus Seeks Vengeance Against Marcel and Rebekah [Video]

"The Originals" will return with an all-new episode on Tuesday, which will take viewers on a trip back to 1919.

In last week's episode, "Long Way Back From Hell," Rebekah's darkest secret was exposed when Klaus found out that she and Marcel were responsible for bringing Mikael to New Orleans and running him out of town. Thanks to Genevieve, Klaus was made aware of his sister's wrongdoings and will seek revenge, reports WetPaint.

A large part of the upcoming episode, "Le Grand Guignol," will take place in a flashback to 1919 where Klaus will open up to Cami about his family's betrayal and reveals details about the secret that Rebekah and Marcel tried to hide from him. In the present, Marcel and Rebekah will go on the run, but Klaus will promise to make Marcel and Rebekah "pay" for their transgression.

In the meantime, Elijah will form an unlikely alliance while Hayley will hold Sabine Celeste hostage in order to gain information about her clan.

In the promo, Marcel tries to convince Rebekah that the only way to escape Klaus' wrath is to leave town.

"There's only one way that we can hide from Klaus: Get out of town," says Marcel.

Rebekah responds by calling it a "suicide mission."

Meanwhile, Klaus is seen laying in bed trying to recover after being hit by another dagger filled with dark magic. "They will pay for this," Klaus vows to Elijah.

New shots from the flashback episode show Mikael approaching Marcel while holding a family photo to ask for information about his estranged son. Another photo shows Elijah and Celeste sharing a tender moment, reports TVLine.

According to Dread Central, a synopsis for the episodes reads:

"In a series of flashbacks to 1919, Klaus (Joseph Morgan) opens up to Cami (Leah Pipes) and reveals details of the devastating secret Rebekah (Claire Holt) and Marcel (Charles Michael Davis) were trying to keep from him. Elijah (Daniel Gillies) forms an unlikely alliance with Monique (guest star Yasmine Al Bustami) and asks for her help in locating Sabine (guest star Shannon Kane.)"

The synopisis continues, "Elsewhere, Thierry (guest star Callard Harris) is reluctant to get involved when Marcel and Rebekah approach him with a plan to take down the witches. Meanwhile, in the bayou, Hayley (Phoebe Tonkin) is at her wits' end and holds Sabine hostage in an attempt to get information that will reverse the curse on Phoebe's werewolf clan."

"The Originals" S1E14, "Le Grand Guignol," airs Tuesday, March 4 at 8 p.m. EST on the CW.

Watch a preview below.