In 2020, after the colonization of the moon, the spaceships Vega, Sirius and Capella are launched from Lunar Station 7. They are to explore Venus under the command of Professor Hartman, but an asteroid collides and explodes Capella. The leader ship Vega stays orbiting and sends the astronauts Kern and Sherman with the robot John to the surface of Venus, but they have problems with communication with Dr. Marsha Evans in Vega.

A bedridden and gravely ill man believes his wife and doctor are conspiring to kill him, and outlines his suspicions in a letter.

Snagglepuss finds a missing baby and goes to the address where the baby lives to collect the reward. But it is the lion-hating Major Minor's baby and the Major gets out his hunting rifle to reward Snagglepuss with a bullet. Snagglepuss has difficulty trying to avoid the Major because the baby knows all Snag's hiding places and leads the Major to them.