It starts with these two aliens:
And a lawyer called Nick Carter, who is not this Nick Carter:
If I were to describe the plot, it would make me sound insane, which is a good thing. So, I will just let the book trailer do the work:
Have you ever read Douglas Adams and wished the plot started making some sense? Have you ever read Terry Pratchett and wished there was more than one excruciatingly stretched joke per book? 
Well, if you have, I recommend you give Year Zero a try. It's hilarious, it has a plot of sorts, and has at least three different jokes in it. A working knowledge of lame 80s (and 70s) music helps but is not horribly necessary.
So, I give this five stars  and recommend it to every one.