Once upon a time.
It was a dark and stormy night.
No, I didn't use any of those to start my book, I began with a death - a tragedy to introduce the hero's father, and some other characters who would become important later on.
Why? Because the death made everything that followed possible. I can't go into too much detail about that without spoiling part of the plot, but as Tamsin's legacy was so important I wanted her to have one scene, even if it was only a brief one.