Friday's all-new episode of "Grimm" is going to be very intense and dramatic as Juliette continues to lose her humanity.

A preview of the upcoming episode, which is titled "Hibernaculum," reveals that Monroe and Rosalee will learn the shocking truth about Juliette's transformation into a hexenbiest. Juliette will also try to sleep with Caption Renard as she loses more of her humanity, which will put her friends and loved ones in danger since they might not be able to stop her. In addition, she will become adamant about seeking revenge against Adalind.

In the meantime, Nick and Hank will go on the hunt for a rare Wesen that leaves its victims frozen solid. According to Dread Central, Matt Keeslar will guest star as Sven Gunderson, the Wesen of the Week.

Carter Matt also notes that the episode title, "Hibernaculum," could be a clue of what's to come. The word stems from zoology and is defined as a place where animals often seek refuge for hibernation during the winter months. It also represents a place of escape, which many of the characters may be in need of due to the chaotic situations beyond their control.

The synopsis reads as follows:

"Nick (David Giuntoli) and Hank (Russell Hornsby) are called to investigate a rare Wesen that leaves its victims frozen solid. Meanwhile, Juliette (Bitsie Tulloch) starts to feel that she is losing her humanity as she seeks to get revenge on Adalind (Claire Coffee). Elsewhere, Captain Renard (Sasha Roiz) continues to suffer from mysterious bleeding and visions while Monroe (Silas Weir Mitchell) works toward coming to grips with the Wesenrein incident."

"Grimm" Season 4, Episode 17, "Hibernaculum," airs on Friday, April 10, at 8 p.m. EST on NBC.

Watch a preview video below.