A furious thunder-snowstorm makes landfall while Wynonna and Waverly are forced to confront their demons - and each other.

Wynonna has an opportunity to discover the origins of the Earp curse while her team works to save the future.

The team may not be able to save one of their own after a deadly run-in with the widows.

Wynonna is running out of time, and is desperate to defeat the widows before her fate is sealed.