When I was three years old, my parents died in a car accident. I remember almost nothing about them. Thomas, my father’s best friend since childhood, adopted me after their death. He raised me as his own, never letting me feel alone. He read me bedtime stories, cheered at every school performance, and later walked me down the aisle. Occasionally, he told me small stories about my parents, but he never went into detail. He said it was too painful to relive those memories. He never married, never had other children—I was his whole world, just as he was mine.

Last month, Thomas died of cancer. The world felt like it had dropped away beneath me. A few days after his funeral, I returned to his house to pack some of his things. Through the window, I saw an unfamiliar woman slipping something quickly into the mailbox. I ran outside and called after her, but she disappeared down the street.

Inside the mailbox was an envelope, unmarked, without a stamp. Inside, a note and a flash drive. My hands trembled as I read: “You don’t even know what really happened to your biological parents. Thomas wasn’t who he pretended to be. If you want to know the whole truth, watch the flash drive.” My heart pounded. Fear surged, but so did curiosity.

I ran inside and plugged the flash drive into my laptop. The files opened, and I almost fainted. Every truth I had believed about my parents, about Thomas, about my entire childhood, was about to unravel.