Hazel is in Venice, on a spontaneous holiday with her stepbrother Enzo and best friend Phoebe. They have just helped Hazel escape her increasingly destructive relationship with her older boyfriend, and have come away to celebrate her being her again. In the dreamy Italian sunshine, Hazel is managing to relax, to stop looking over her shoulder in case Freddie has followed her here. But there’s a girl she keeps seeing in the city. A girl with beautiful eyes. And whenever Hazel sees her and their eyes meet, something strange seems to happen - de ja vu, at first, and then…