When God Gets the Blues

What if the multiverse, with its trillions of worlds, is the physical manifestation of the ever-expanding form of God? Well, it is. Only, God is feeling blue - downright depressed. Its depression is spreading like a blight, universe by universe. To stop the spread before all the worlds drown in darkness, two unlikely friends will need to find the anti-depressant, kill a bunch of unfriendly folks, and stay one skip ahead of the interdimensional policing agency bent on their bloody murder.