(This synopsis is taken from memory only from an original viewing of this episode back in 1960s, and is full of gaps.)
The government have declared a population growth policy in which each couple is licensed to have one child. The wife of the Minister however, discovers that the water from an old well near to their home enhances fertility. Crowds of women flock to the well to use the water, thereby putting the government's policy in question. The Minister's wife is discovered to be pregnant which further embarrasses him, as they already have one child. The situation is saved when an older women gives her license to the Minister's wife, allowing her to have an extra child.
However, there is one last twist to surprise everyone.