Scientist John Fleming thinks the message from outer space is actually a plan to build a super computer. Unknown to him, his colleague, Dennis Bridger sells this secret information to an international cartel and soon someone following Bridger is murdered. The computer is eventually built, but the only one who can understand what it prints out is Fleming.

Fleming and Bridger have discovered that the messages are coming from the constellation Andromeda. With the help of the computer, the scientists end up producing a synthesized living organism. Bridger is soon arrested after it is found out that he was the one selling the secret information, but he ends up escaping.

Professor Dawnay somehow succeeds in making the synthesized creature grow. However, the computer cannot communicate with the creature. Fleming suggests that they find a way to arrange a direct electrical supply between it and the machine.