Daughter of Death

What if Nico Di Angelo found someone when he was in Tartarus? What if they both made it out alive?
What if he already knew them? What if secrets are revealed that should have stayed hidden?

Enter: Phoenix Ashwood...the sarcastic 14 year old daughter of Thanatos is many things, not all of them good but oh well who cares? Not her. When Phoenix left Camp Half Blood she never planned to returning, but as usual the fates just HAD to interfere.
She knew her father was the God of the Dead- I mean she did live in the Underworld for a while- but no one else knew that.
While looking for her father after he went missing she found herself in a place no demigod had survived so far. But when she finds a familiar face in monsters home after being there for already 2 weeks alone, she doesn't know how to react.
Secrets will come to the surface that should have stayed buried.
What will happen when the truth is discovered? Guess you'll have to read to find out.

Disclaimer: Sadly all characters belong to Rick Riordan except Phoenix and any other characters I come up with along the way.