“Stranger Things” star Millie Bobby Brown has set a new project called “A Time Lost” at Netflix in which she’ll produce a feature film based on an original story she wrote with her older sister Paige Brown, Netflix announced on Tuesday.

Brown will produce the film through PCMA Productions, and Anna Klassen is attached to write the script based on the original story from the Brown sisters. Paige Brown is also executive producing with Robert Brown.

“A Time Lost” details a long-standing feud between two Long Island families that comes to a head when one of their teenage daughters is diagnosed with cancer.

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“We are so grateful to Netflix for their confidence in us and this beautiful story, which we have spent years writing and developing. It’s about friendship, family and overcoming obstacles when it feels like the world is pushing you down. It’s been a labor of love, literally,” Millie Bobby Brown and Paige Brown said in a joint statement.

“Millie is an extraordinary creative talent. We’ve been lucky to have her in our family from the beginning of her career. It is a genuine thrill to witness Millie bring her distinct vision to the screen, now as a writer and producer, alongside her sister on this wonderful film,” Lisa Nishimura, Netflix’s VP of independent film and documentary features, said.

In addition to reprising her role as Eleven in the third season of “Stranger Things,” Brown recently starred in Warner Bros.’ and Legendary’s “Godzilla: King of Monsters” and will be seen again in “Godzilla vs. Kong.” She’s also currently filming Legendary’s “Enola Holmes” opposite Henry Cavill as Sherlock Holmes, Sam Claflin and Helena Bonham Carter.

Brown is represented by WME and attorney Steve Warren. Klassen is represented by WME, Writ Large and Myman Greenspan.