Her first lead came from a laundromat two blocks away. The owner remembered a nervous man who'd paid in cash and left, humming an old tango. He'd been carrying an insulated envelope stamped with a postal code Mara didn't recognize. She cross-referenced the code and found a tiny coastal town two hours north. There, an artist named Ben Ferris ran a workshop converting abandoned piers into kinetic sculptures. Locals called him "BF" for short.