Assassin by Accident

If a megalomaniacal earth mage kidnaps your little sister, do you:

A) Kill him

B) Kill him

C) Kill him

D) Magically indenture yourself to him to ensure her safe return

Welsh water horse Nevan Quirke would have happily opted for A, B, or C, but had no idea where his sister was hidden--so, option D it is. He's not a fool, though. He made sure to limit his obligation to a single task.

Unfortunately, he neglected to nail down a few tiny details before the geas brand was seared into his skin, and now...