Imagine you've finally escaped the worst relationship of your life, running away with only a suitcase and a black eye. Imagine your new next-door neighbours are the friends you so desperately needed - fun, kind, empathetic, very much in love. Imagine they're in trouble. That someone is telling lies about them, threatening their livelihoods - and even their lives. Imagine your ex is coming for you. If your new best friends needed you to tell one small lie, and all of these problems would disappear, you'd do it, wouldn't you? It's only one small lie, until someone turns up dead.