For the first eleven years of their lives, neighbors Lila and Gavin were inseparable best friends. They did everything together.

Until they didn't.

Every detail of Lila's life has been meticulously planned out since she was a child. To the point where she forgot one vital thing: to live. When she receives news that drastically alters the path of her future, she realizes she has one last chance to create memories and make the most of her summer.

Gavin, on the other hand, is known for his carefree attitude. He has lived a charmed life for almost eighteen years. He's never short on friends or a good time, he has a supportive family, and he's all set to go off to college and follow his dreams. The one thing he doesn't have is the girl.

He doesn't know why Lila pushed him away all those years ago, but when Gavin finds her summer bucket list, he's determined to help his goody-two-shoes neighbor cross off every item and hopefully mend their friendship in the process. Even if that's not all he wants from her.

He just hopes it's not too late.