​ An avalanche stops the Orient Express dead in its tracks. It’s winter, 1934. An American tycoon lies dead in his compartment, his door locked from the inside. Trapped in the snow with a killer still on board, can the world’s most famous detective, Hercule Poirot, crack the case before the train reaches its final destination?

Five southern women, whose friendships began many years ago on their college swim team, set aside an annual long weekend every August to recharge those relationships. They meet at the same beach cottage, the “Sweet Delilah” on North Carolina’s Outer Banks to catch up, laugh, and meddle in each other’s lives.