Married couple Mira and Sam have their lives upended after Mira goes back to working from the office after a long period of working from home. When Mira comes home after her first day, her husband Sam is suddenly, strangely sure that she has been replaced by some kind of clone.

Seeking answers, Mira finds a very unconventional therapist named Dr. Latham, who specifically treats people suffering from Sam’s ailment. But once they’ve committed to Latham’s intensive, exhausting process, Sam and Mira find themselves uncovering buried truths that will change their entire lives.