Viewers are in for a ride when "The Curious Case of Natalia Grace: The Final Chapter" returns for its third and final season in January. The Investigation Discovery series follows Natalia Grace, a Ukrainian orphan with a rare dwarfism condition, as she "is forced to navigate a number of seemingly insurmountable challenges," per a press release.

The third season of the ID channel docuseries brings to light allegations of financial and physical abuse against Natalia’s new adoptive parents, Antwon and Cynthia Mans; THR reached out to the Indiana Police Department about the allegations.

The series follows the Barnett family, who initially adopted what they assumed to be a 6-year-old Ukrainian orphan with spondyloepiphyseal dysplasia, a rare bone growth disorder.

Who are Natalia Grace's adoptive parents? Here's where she stands with the Barnetts, the Manses and the DePaul family.

"There were zero hesitations in continuing the story," says ID president Jason Sarlanis of the 'Final Chapter' episodes, streaming Jan. 6-7.

In the final chapter of Natalia's story, a former adoptive family, the DePauls, attempts to uplift and support Natalia to gain financial and personal independence from the Manses. The twisty documentary series unveils more shocking details about Natalia's former adoptive family in four episodes released on Jan. 7 and 8 on Max.

The highly anticipated documentary sequel, ‘Curious Case of Natalia Grace: The Final Chapter,’ delves deeper into the controversial allegations surrounding Natalia Grace’s adoptive family. Released on January 5, the follow-up examines new perspectives on the case that captured international attention.

Michael and Kristine Barnett adopted a Ukrainian girl named Natalia Grace, whom they believed to be 6 years old. However, the couple soon began to suspect that she was an adult con artist who wanted to kill them.

The Final Chapter' episode 2 recap: Outside observers accuse the Mans family of physical abuse and financial fraud

Jan. 6, Natalia Grace's premiere episode of her new docuseries aired as she opened up about the physical and emotional abuse she experienced at the hands of her adoptive families