Gabby and Fred have just begun to adapt to their new life as empty nesters when Gabby makes a stunning realization: she can't stand her husband.

One night at a bar, Gabby meets an enigmatic younger woman named Ellis, and in a haze of drunkenness, she confesses that she wishes Fred dead. Surely she didn't expect anything to come of it, but when she tries to track Ellis down again, she realizes that Ellis might not have been who she said she was.

As Gabby begins to unravel the truth about Ellis, and what Fred might be hiding, she is thrown into a whirlwind of lies and manipulation. How much is she willing to risk to expose the truth? And who is the real target?