Fandom: Percy Jackson and the Olympians/Heroes of Olympus
Pairings: Leo/Piper. Most of the time.
Summary: Because the only person she failed to save (and love) was Leo Valdez.
Rating: T because Leo mildly swears and something else if you can read between lines.
Warnings: As you probably guessed from the summary, character death. And long one-shot.
Notes: Dark AU, Post-MoA, Post-THO, 7000 words long, done for a challenge.