Former "19 Kids and Counting" stars Jessa and Jill Duggar will be back on TLC with a three-part special titled "Jill and Jessa: Counting On," where they will open up about the scandal involving their older brother Josh and how they move on from that.

A promo for the new show released by TLC shows the new mothers talk about how unimaginable their situation was and how worried they became of Josh's wife Anna, who they believe was the person that felt the biggest impact when the news about eldest Duggar sibling's molestation scandal exploded.

The show will also allow fans to check back in on Anna, who has kept her lips tight on the matter. For the first time, she will finally open up about the tough time she has been through. TLC teases there will be "emotional and candid interviews."

"Jill and Jessa: Counting On" is also "an opportunity to share their story and begin celebrating big moments in their lives." It will follow the sisters as they go about their life as wives and mothers.

It will see Jill as she prepares for missionary work in Central America with her husband Derrick Dillard and their son. Fans will also get a glimpse of their journey to a new home. The couple also makes sure to give advice to Jessa and her husband Ben Seewald before they head out.

Jessa's story will focus on her pregnancy, her labor and her first days with her first baby Spurgeon Elliot. The younger Duggar welcomed her first baby early this month and fans will get to see what happened before and after that in "Jill and Jessa: Counting On."

The three-part special will kick off on Sunday, Dec. 13 with a 90-minute opener. The two following episodes will be aired Dec. 20 and Dec. 27, respectively.