For her own sake, Emily (Emily VanCamp) should really watch her back in 'Revenge' Season 4 Episode 16 titled 'Retaliation,' as it appears that Marguax (Karine Vanasse) is getting organized in a plot to stab her. While the popular ABC series returned from a prolonged winter hiatus last Sunday, fans can expect a jam-packed new episode next Sunday, with the storyline focusing on Emily vs Margaux.

According to spoilers posted by IB Times, Margaux has been keen to clear the name of her baby's father since the demise of Daniel (Joshua Bowman), as Emily had tarnished the name to protect herself. Though Emily did push Daniel under the bus after his death, it does not mean she has no regard for the man who gave up his life for hers. In the end, that also doesn't help to change the fact that everyone now sees Daniel as an attacker, who was killed by Emily in self defense. At least, this is not acceptable to Margaux.

In Episode 15 titled 'Bai,' Margaux made an attempt to seek revenge on Emily. She used the dirt she found on Em to reveal Emily's actual, wicked nature to the world. Nevertheless, the outrageous scoop she found on her vengeance would also destroy her friend Jack (Nick Wechsler). When Jack came to know about Margaux's plot, he planned to use his 'nice-guy' image to his advantage. In fact, he presented a bracelet (made by his child) to Margaux and the bracelet was installed with a computer chip with a view to wipe out the blackmailing video.

After the tape was destroyed, Margaux assured Emily that she would discover a different way to attack -- unveil Em's weak spot. The official synopsis of 'Revenge' Season 4 episode 16 says that Margaux may possibly found a way much before she expected. It reads, "Margaux steps up her plans to take down anyone who stands in her way."

The audience saw episode 15 end with Margaux talking to Emily's current beau, Ben (Brian Hallisay), regarding the whereabouts of his wife. Now the question is whether this could actually be the "weak spot" that Margaux was referring to. If it is, it will not be the first time that Emily's adversaries will be using one of her lovers to hurt her. Perhaps, this was the reason why Em was so reluctant to start a relationship with Jack.

'Revenge' Season 4 Episode 16 titled 'Retaliation' will air on Sunday, March 15, on ABC.