The Four From Dover are professional ghost hunters. Their goal is a bit different from others; they find ghosts who in life committed great crimes and then send them to the hell they belong in. They are led by Kostchie who is not divine, demonic, elemental, nor fay. He's Kostchie and he does not die. Two others have died, Lamire and Gullberry. Lamire is a mistress of illusion and Gullberry despite looking like Danny DeVito gone to seed and then mulch is a master of the magics of binding spirits. The only human, George O'Day, keeps the band on the up and up and acts as the public face. Who is paying their bills is a mystery.
This was something you needed to know.