Amy Daniels has a pretty nice life. Her career is on the up, she loves her friends, and she's about to buy her very own flat. Amy can see something no one else can: the end. As soon as she kisses someone, she knows, in intimate, vivid detail, how their relationship will finish. A screaming argument in the middle of the supermarket over milk. An explicit email sent to the wrong address. There seems to be no end to the unhappy endings. After years of trying, and failing, to change a pre-written future, Amy has given up. But then she drunkenly kisses three men at her best friend's wedding and sees three possible endings: two painful, one perfect. The problem is, Amy can't really remember who she kissed, and worse, what ending belongs to which person—the only thing she knows for certain is that she's determined to find out...