Backpacking alone on the Appalachian trail, a married woman meets a younger hiker and the two strangers become inexplicably drawn to one another.

A ride-share driver finds himself transporting the man who is secretly sleeping with his wife.

What starts as a poignant medical documentary about Deborah Logan’s descent into Alzheimer’s disease and her daughter’s struggles as caregiver degenerates into a maddening portrayal of dementia at its most…