Write about a character who wakes up one day with no memory of who they are or how they got there

Write about a character who wakes up one day with no memory of who they are or how they got there. They must navigate through a world where everyone around them seems to know them, but they can’t remember anything about their past. As they try to piece together their identity, they uncover dark secrets and hidden truths about themselves that they never could have imagined.