2 divs, 1 hidden that triggers the other when hovered over

2 divs, 1 hidden that triggers the other when hovered over

I want to have a div that has 2 divs within itself and the bottom div is
hidden until you hover over it.
<div class="div_wrapper">
<div class="div_one">Image</div>
<div class="div_two">description</div>
</div>
The description is hidden until you hover over the image then it shows
below it, when you hover off the image or description then they
description goes back to hidden.