The lost colony planet Denner's Wreck was found by a group of immortal, high-tech tourists who decided it would be fun to hang around for a few centuries playing at being gods for the low-tech descendants of the original colonists.
One of the Powers, Geste the Trickster, played a prank on a mere mortal, Bredon the Hunter, and Bredon didn't let it go. He held Geste to account, and found himself caught up in the affairs of the immortal Powers -- one of whom is a murderous psychopath...