As the sun beats down on Destin, life takes a dramatic turn-starting with its tiniest new arrival. Jonah settles into life as a single father of a newborn, but then his seemingly perfect sister shows up with a few secrets of her own. Will the new family dynamics mean the end of Eli and Kate's budding romance? Tessa finds herself entering a new chapter that forces her to take a risk that could blow up in her face...or make her secret dreams come true. But it is Maggie who keeps the biggest secret of all-setting off on an adventure with Jo Ellen that is both heart-stopping and hilarious. In a season of sunshine and second chances, some secrets are meant to stay buried. But others will come to light. Will that bring these two intertwined families ever closer...or will life at the Summer House be forever changed?