“You know how you were saying that you don’t feel safe?” Heather, a young celebrity (Zoë Kravitz), asks her assistant (Lola Kirke) in the trailer for “Gemini.” “I feel like that all the time.”

The movie star’s fears aren’t unfounded: the next time Jill the assistant reports to work, she finds Heather dead, the victim of a violent crime. Even worse? The murder weapon is the gun Jill loaned to Heather.

Written and directed by Aaron Katz (“Land Ho!”), “Gemini” co-stars John Cho (“Star Trek” franchise) as a detective who believes Jill is somehow involved in the murder. He’s not the only one. “Motive, opportunity, capacity,” a friend (Nelson Franklin, “Veep”) tells Jill, presumably spelling out why she’s the prime suspect. “You two were, like, freaking best friends — people like that kill each other all the time.”

Kravitz was last seen in the hit HBO miniseries “Big Little Lies” and in Lucia Aniello’s ensemble comedy “Rough Night.” Kirke most recently appeared as a young army recruit in love with a married woman in Deb Shoval’s “AWOL.” She is also a series regular on Amazon’s New York Symphony-set series, “Mozart in the Jungle.”

“Gemini” is scheduled for a spring 2018 release.