When doting mother, loving wife and National Guard reservist Kelli (Cardellini, best known as Scooby-Doo's Velma) returns from a call of duty in the Gulf it's not not to the blue collar life she left.
While never seeing a bullet fired in anger or being on the receiving end of an enemy assault, she's seen enough to quietely traumatise her...and domestic life back in flyblown Ohio isn't going to make things right.
To begin with she settles back into the routine with apparently doting plumber husband Mike (Shannon) and her two girls while returning to the mind-numbing drudgery of work at a rivet-popping metal factory.
Hooking up with her childhood buddies after work, an easy way to release the pressure is to head down to the local bar for a shot-fuelled girl's night out.
However, almost imperceptibly, things have changed. First, she impulsively walks out of her job after 12 years without a word to Mike, who she subsequently discovers has been having an affair.
This shock discovery is her cue to hit the bottle even harder and gather speed in a gradual descent into divorce and rehab. Plus the news the army wants her back.
Debut writer-director Liza Johnson, doesn't play the blame game preferring to observe how people - often good but flawed - can find themselves in a relentless downward trajectory.
There's no glib emotional grandstanding with the cast - particularly the excellent Cardellini - unshowily inhabiting their roles and underlining the assertion that it really could happen to anybody.