An under-the-radar phone call from the U.S. State Department puts Marc Royce once again on assignment. At stake is Iran's threat to blockade the narrow Strait of Hormuz, cutting off vital shipping routes and escalating global tensions beyond the breaking point. Royce finds himself in Switzerland with only sketchy information, but it turns out the Mossad has sent someone to keep an eye on him, which is of more than casual interest to the Israelis. And it's someone Royce knows...