After a recent divorce, Mackenzie Granger opens her summer camp, Camp Little Otter, and tries to run it on her own. Financial struggles cause her to consider a buyout offer from Roger Shepard, owner of Camp Ridgefield, the resort across the lake. Mack's son, Buzz, is a counselor-in-training and promises a successful summer. Handyman Cole helps out, but appears interested in Mack more than her camp. Lead counselors Robbie Matthews and Sarah Brennen continue their annual summer romance.

Mack announces the annual "capture the flag" competition. Her ex-husband Steve arrives, looking for a place to stay for a while and she lets him stay and help. Robbie must assist his mother with her troublesome gambling.

Little Otter prepares for its mixer dance with Camp Ridgefield. Buzz thinks his deejaying the event will improve his reputation with the ladies. Mack hears about a guest family switching to the more-modernized Ridgefield and ponders installing a cell tower.

It's Valentine's Day in July, with Valentine-grams and a carnival. Mack must give Roger a private tour of Little Otter, when he wins a raffle. On the tour, they argue, flirt, and eventually succumb to their mutual attraction.

Camp Little Otter gets a record-breaking heat wave and everyone tries their best to keep cool. Buzz's 16th birthday is drawing near and he plans the greatest party the camp has ever seen in his cabin, or so he thinks. Sarah goes to Camp Ridgefield to borrow a generator and she meets her secret crush, Miguel Santos. Mack is surprised when her ex-husband gives Buzz the night vision goggles she had planned to give him for his birthday. Cole must help her come up a more-perfect birthday gift.