Justin brings his birth daughter Billie to the lake where he spent summers as a boy and finds that it's not so easy to forget the past in the small world of cottage country.

Justin and Billie use an invite to Games Night at Maisy's for a chance at scheming her out of the cottage, but Maisy's no stranger to schemes or to Justin's BS.

Justin enlists Jayne and Wayne's help at the Boathouse election, and Billie tries to conquer her fear of dark water and secret f*ckboys.

Maisy brings out the big guns with her ties to local politics and Justin tries to negotiate a threesome, meanwhile Billie and Killian engage in light environmental crime.

The lake community scrambles to prepare for the Boathouse Talent Show, including Billie and her birth mom Teesa. Justin struggles to mend bridges with Billie and build new ones with Opal while Maisy remains wary of his intentions.

Things on the lake take a terrifying turn when Billie, Killian, and the Quads use a Ouija board to track down the true history of the Murder Cabin.

Maisy and Justin are stranded on a floating dock until they come to an unorthodox agreement about the fate of the cottage, while Billie and Killian have weird day at the Quads' birthday party.

The lake community comes together one last time for Tiltapalooza, the final blowout of the summer. Relationships will end, Tilts will be won, and the fate of the Lovejoy cottage and murder cabin will be decided.