On October 17, he stood in Battery Park, under a sycamore with a faded heart carved into it. At the base, buried beneath orange leaves, he found a rusted lunchbox. Inside: a USB stick, a folded note, and a single orange candy—still wrapped.

“I hid pieces of a map inside these images. Steganography. You remember how I taught you? Least significant bits. The password for each is the answer to: If there R PIXS—POS... Complete the phrase.”

She leaned closer. “There are pictures. PIXS. Positions. The file name—MP4 SS—means ‘Missing Piece 4, Seek Sequence.’ Lilu Nn? That’s ‘Lilu’s Notes.’ Orange Leo? You always wore that orange hoodie. You were my constant.”