The Silent Service (2024)

The floating dock Southern Cross, which is carrying the Yamato, begins to sink under the attack by the U.S.

Kaieda appears at the meeting. The alliance negotiations between Japan and the independent nation Yamato are reported to the world.

After the battle with the U.S. Third Fleet, Kaieda arrives at Tokyo Bay to conclude an alliance with Japan. The Japanese government announces to the public a series of events that began with the top-secret Seabat Project. Ichiya, a news anchor, is present at the press conference.

A Japan-U.S. summit meeting is held, but neither country concedes to the other's claims. Prime Minister Takegami continues with the negotiations, hoping to avoid war. Meanwhile, the U.S. Third Fleet launches an anti-submarine missile at the 2nd Maritime Self-Defense Force convoy led by Commander Numata, which has been dispatched to escort the Seabat. Numata tries to maintain a defensive posture.

Kaieda finally begins to combat the U.S. forces. Three nuclear submarines of the Seventh Fleet close in on the Seabat. Meanwhile, the Japanese government is preparing for a summit meeting with U.S. President Bennett. Chief Cabinet Secretary Wataru Unabara moves in to coordinate the will of the cabinet.

Fukamachi's diesel ship Tatsunami arrives in the area, where the operation is in a standstill after Kaieda's declaration. Fukamachi boards the Seabat to try to stop Kaieda, and he hears about Kaieda's true intentions.

The state-of-the-art nuclear submarine Seabat, which was hijacked by Kaieda, surfaces in front of the U.S.

The Maritime Self-Defense Force submarine Yamanami collides with and crushes a U.S. nuclear submarine in the waters near Japan. Shocked by reports that all 76 crew members, including the CO, Shiro Kaieda, were killed, Hiroshi Fukamachi, CO of the MSDF diesel submarine Tatsunami, becomes suspicious of the accident and analyzes the data recorded at the time of the collision, which reveals that Kaieda and his crew had escaped just before the accident. Fukamachi has a history with Kaieda due to a past maritime accident.