Once Upon A Time season 4 episode 10 synopsis teases chaos: Will Emma save Storybrooke in Shattered Sight?

With just two episodes remaining for the fall finale of Once Upon a Time season 4, the Storybrooke residents are in mortal danger of killing each other, after coming under the Shattered Sight spell.

The tenth episode is titled Shattered Sight, where Storybrooke will be in a state of chaos with all the residents under the Snow Queen's curse.

According to the synopsis, Emma and Elsa race against the clock to free themselves of the ribbons and take down the Snow Queen and her curse.

Also, Snow White and The Evil queen, under the spell forget their friendship and will be at each other's throats. And David can only watch when Regina clashes with Mary Margaret in an epic battle.

Meanwhile, Gold gathers Belle and Henry as he prepares to leave town forever, and Will Scarlet looks to square his tab with Hook.

The synopsis also says, "Kristoff's thick-headedness leads Anna to a heartwarming discovery."

Sunday night's episode titled Fall witnessed the calm before the spell of Shattered Sight storm, as the town frantically tried to stop the Snow Queen, and the looming dark purple clouds in the sky seemed waiting to wreck havoc.

Also, Elsa was finally reunited with her sister Anna and Hook's lack of heart makes Emma suspicious.

Meanwhile, Rumple successfully makes another deal with the Snow Queen, in return for allowing Belle and Henry to escape town with him.

The dark One agrees to keeping her, Elsa, and Emma safe when he destroys Storybrooke.

Athough Charming tells Snow, "no spell is strong enough to break what we have," the episode ends with the shattered glass starting to fall like confetti and appearing in everyone's eyes, and Snow and Charming "love filled" looks were replaced by confusion and hate.

Watch the Shattered Sight's promo here: