In the rain-soaked streets of modern Hamburg, retired special-forces operative Joan Voss and his dentist wife, Ana, stumble into a pulse-pounding conspiracy when an entire S1 commuter train-and its 200 passengers-vanishes between stations like a ghost in the fog. What begins as a glitch spirals into a high-stakes unraveling of PortSec Dynamics' shadowy "Phantom Fleet": A black-market AI syndicate using experimental cloaking tech to "fold" vehicles into quantum limbo for corporate espionage, smuggling, and silencing whistleblowers. Blending fast-paced chases through Fischmarkt crowds and Elbe river shootouts with the absurd grind of expat family life-school runs, Duolingo disasters, and Ana's insatiable (yet mysteriously calorie-proof) appetite-the Vosses, alongside their pint-sized prodigy son Ricardo (whose crayon doodles crack unbreakable codes), tag-team gadgets, grit, and sarcasm to outwit the villainous CEO Viktor Hale. From locked-room riddles in derelict shipyards to a climactic yacht takedown, this sarcastic, cinematic romp delivers cozy Christie cleverness with Indiana Jones thrills, proving that in a city built on secrets, the real mystery is surviving parenthood amid vanishing trains.

Juan Falcón is a born explorer, though his maps aren't always of mountains and jungles, but rather of systems, risks, and critical decisions. Born in Latin America and based in Hamburg, he has learned to navigate vastly different cultures, languages, and worlds, from boardrooms to train stations lost in winter. Accustomed to thinking under pressure and drawing up plans B, C, and D, he brings that same strategic perspective to every trip and every story: what can go wrong, how to prepare, and, above all, how to keep going when things take a turn for the worse. In his adventures, the compass points not only north, but also to family, curiosity, and the constant search for new horizons.