Ichor: Blood of the gods

Eden thinks she knows herself. Her wants. Her desires. Her memories. Who she is in general. But a letter in a withered envelope makes her second guess her whole life.

One night, while walking through a dark ally, a mysterious stranger forces a letter upon her insisting she reads it. Just as mysteriously as he appeared he disappears back into the night.
At first Eden writes off the confusing letter as a prank, but as more claims, from the letter, start to make sense, she starts unlocking memories she never knew existed and a desire she has never experienced before. Revenge.