The first official trailer for “The Disappearance of Eleanor Rigby” will transport you to “someplace good,” as star Jessica Chastain puts it simply, before taking a turn for the worst.

This groundbreaking take on an age-old love story, which marks Ned Benson’s feature film debut, explores a rough patch in a young couple’s marriage told from different vantage points. “Everyone starts out thinking this is forever. But then things get hard,” the voiceover says amid scenes of laughter.

The two-part love story, “The Disappearance of Eleanor Rigby: Him” and “The Disappearance of Eleanor Rigby: Her,” premiered back-to-back at the Toronto International Film Festival. The movies were combined for an alternative version, “The Disappearance of Eleanor Rigby: Them” for the Cannes Film Festival.

Chastain and James McAvoy tell this story about “a girl who loves a boy” and “a boy who loves a girl.”

“The Disappearance of Eleanor Rigby: Them,” which costars Bill Hader, Viola Davis and William Hurt, hits theaters on Sept. 26. “Him” and “Her” will follow later in the fall.