Once upon a time the Jade emperor
(rulers of the heavens) had 10 sons (suns)
that
made the world TOO HOT. He enlists in the
help
of Houyi
(The great archer) to shoot down all but one
To show his appreciation, he gifted Houyi with one elixir of immortality.
Out of the good of his heart He decides to stay mortal by his
wife's side and put the vile somewhere for safe keeping.