Even Hand is a novelette written by Jim Butcher. It was first published in the anthology Dark and Stormy Knights, edited by P. N. Elrod. It was reprinted multiple times.
Plot[]
Gentleman John Marcone is the major Chicago crime boss in the Dresen series. A woman named Justine shows up at Marcone's place and asks for asylum by the Seelie Accords. He's not excited about helping her, but he knows she has connections to the White Court of vampires and she has a child with her. A creepy water-demon Fomor is chasing her. She's taken something from them, and he wants to take the woman and the child back into the water with him.