Up-and-coming singer Tammy Wynette gets a big break when she's asked to open for her idol, country legend George Jones. The two have an immediate romantic connection and undeniable musical chemistry, but their would-be pairing faces a major obstacle: Tammy's husband Don Chapel.

The President and First Lady of Country Music are on top of the world: hit after hit, award after award, and a new baby to boot. However, when a once-in-a-lifetime opportunity presents itself in Las Vegas, Tammy is forced to question whether George can handle the pressures of superstardom.