Three close friends… Two unforgettable summers… One girl's deepest secret…

Alys appeared last summer, and then she vanished without a trace.

Ifan fell in love with her. Hannah hated her. And Marko regrets what they did.

This summer Cait is new in town, and a girl has been reported missing. Cait needs to uncover the truth. What happened last summer? And who is Alys?