Matt, Becci, Sophie and Nathan are a bit of a foursome, even though Matt and Sophie are a real couple, and Becci only wishes that Nathan would notice she's not just Matt's little sister. They're all looking forward to the themed fancy dress party they're going to, getting in to the Christmas spirit, laughing, drinking...They've got futures, dreams, lives ahead of them...Nothing can spoil their fun tonight. But icy roads and a moment of lost concentration causes two of them to see their bright futures shake and crumble, and two of them to lose their lives. What happens that night is devastating. For Matt, Becci, Nathan and Sophie - and everyone who cares about them - nothing will ever be the same again.