A microbiologist and his son discover a new strain of mind controlling fungus in the deepest mine on earth, now they must stop it from getting to the surface and infecting the world above.

I like this a lot!

In my opinion you should found some good adjectives to describe the main characters. I seea potential of "sacrifice" at the end, where the father or the son or someone unexpected decide to blow up the whole mine to save the others.

The ant one is exactly what it's based on.

I like your story idea very much. Could be a winner. I think Nir's take on this is excellent. But I'd keep the mind controlling bit in. Also, maybe say 'while stopping the fungus from reaching the surface and infecting the world' or something that better hits home their urgency to get out themselves without the fungus.