On the afternoon of February 22, 2019, a tall Asian man rang the doorbell of the North Korean Embassy in Madrid. His business card identified him as Matthew Chao, an investor from Baron Stone Capital, with offices in Toronto and Dubai. Once he was allowed in, nine men in their twenties and thirties, carrying pellet guns, knives, and metal bars, entered. They covered their faces with black balaclavas, tied up four staffers with zip ties and handcuffs, and herded them into a meeting room, before taking a senior Embassy official to the basement. His wife and his eight-year-old son were put in a room on the first floor.