All throughout his childhood, Joe Simmons received visits from a mysterious girl, at night, during the full moons. She glows in the moonlight, speaks directly into his mind, possesses incredible, magical abilities-and cannot explain what exactly she is.

As Joe grows up, Serene remains a mysterious presence in his life, sharing his happiest moments and helping him through his darkest. But when friendship begins to turn into something more, Joe discovers that falling in love with a girl who isn't human comes with romantic complications neither of them could have ever imagined!

Caught between the ordinary life waiting for him and a relationship that seems impossible, Joe must discover where Serene truly belongs in his world-and whether some kinds of love were never meant to be understood.