sentences:  Jones meets Professor Montel and his colleagues, a group of scientists, businessmen, and statesmen who suspect the Communist Chinese are building a secret atomic base on an island somewhere north of Japan.They must have proof, so Montel offers Jones another $45,000 if he will command an old World War II-era Japanese submarine being overhauled and follow the Communist Chinese freighter "Kiang Ching", which has been making suspicious deliveries in that area.Jones reluctantly agrees, providing that the submarine is armed, and that he is also allowed to hire some of his former navy shipmates.