Watch Meitantei Conan Movie 26: Kurogane no Submarine

This time's location is set in the sea near the Hachijo-jima island, Tokyo. Engineers from around the world have gathered for the full-scale operation of "Pacific Buoy," an offshore facility to connect security cameras owned by the worldwide police forces. A test of a certain "new technology" based on a face recognition system is underway there.

Meanwhile, Conan and the Detective Boys visit Hachijo-jima at Sonoko's invitation and receive a phone call from Subaru Okiya (a graduate student in the Graduate School of Engineering at Tokyo Metropolitan University, who is an FBI agent Shuichi Akai and a black-robed organization's Rye) informing them that a Europol employee was murdered in Germany by the Black Organization's Jin.

Conan, who is disquieted, sneaks into the facility and finds that a female engineer has been kidnapped by the Black Organization...! Furthermore, a USB drive containing certain information in her possession ends up in the hands of the organization... A black shadow also creeps up on Ai Haibara (Detective Boys' Ai Haibara / Shiho Miyano / the Black Organization's Sherry),..

(Source: Crunchyroll)