Drew shows up with an unexpected guest. Meanwhile, Delilah and Charlie reach a crossroads, and Sam makes a life-changing decision-prompting Percy to do whatever she can to distract from her own feelings. Yearning and jealousy are in the air-just like at that New Year's Eve Party in 2015, when Percy's plus one caused a stir, and an unlikely pair shared a midnight kiss.

Grudges simmer, a love triangle heats up, and Charlie and Percy are forced to reckon with their past mistakes. As Percy struggles under the weight of yet another shameful secret, she thinks about what led to all of this in the first place-that last summer, when they fixed up the boat, and one moment that ruined everything.