Trace returns to Abby after three months on tour only to discover a family in turmoil; Mick ends the fight over the family trust but begins a feud with Connor.
Nell tries to save the Wish Fountain; Abby discovers a never-opened letter that she sent to Trace; Mick inherits a sailboat and reunites with his brother Thomas; Bree welcomes an old friend back into her life.
While Wes' new practically perfect girlfriend reminds Abby that she might be the only "mom" in Carrie and Caitlyn's life; David and Simon's presence in Chesapeake Shores puts Jess and Bree in an unusual position.
Trace discovers that the general manager of The Bridge stole large sums of money; Abby realizes that she can't be a perfect boss, parent and girlfriend; David Peck's sister arrives, threatening Jess and David's relationship.
As the town's annual lantern festival nears, Trace and each of the O'Briens attempt to put their own challenges aside so four generations of O'Briens can come together for the lantern festival.
Battle lines form after Megan reads Bree's manuscript; Trace and Mick disagree over the future of the Bridge; with Jess's B&B's being devoured from within, it appears that the same might be true with the O'Brien family.
Chaos reigns with the closure of the Bridge; the O'Briens are at war over Bree's manuscript; Kevin is heartbroken visiting Sarah's family in Philadelphia; Trace and Abby's relationship is cast into doubt.
