A bitter scientist who feels that Christmas is all a waste of money that could be spent in better places uses his boss's time machine to go back to the day of Jesus' birth. He plans to kill Joseph and the pregnant Mary with a gun he has brought from the future.
Fortunately, his boss soon discovers what is happening and transports him back. After the employee is taken away by security, the boss is forced to make the jump himself to retrieve the weapon before it can do any harm.