Kelley Quinn is the owner of Nantucket's Winter Street Inn and the proud father of four, all of them grown and living in varying states of disarray. Patrick, the eldest, is a hedge fund manager with a guilty conscience. Kevin, a bartender, is secretly sleeping with a French housekeeper named Isabelle. Ava, a school teacher, is finally dating the perfect guy but can't get him to commit. And Bart, the youngest and only child of Kelley's second marriage...

Some of the stormy weather of the past few seasons seems to have finally lifted for the Quinns. After a year apart, Mitzi has returned to rule the roost; Patrick is about to be released from prison; Kevin has a successful new business and is finally ready to tie the knot with Isabelle; and best of all, there's hopeful news about Bart, who has been captured by enemy forces in Afghanistan. That doesn't mean there aren't a few dark clouds on the horizon....