I can't understand this sentence. It's "mistake of crossing the hero" and "trouble in paradise" making me confused.
Can you explain it for me?
When the bad guys make the mistake of crossing the hero, itís trouble in paradise for everyone involved.


And here is the whole passage:
"Upon discovering a collection of priceless Mayan artifacts that have been hidden for over 800 years, the tomb-raiding thieves prepare to take the money and run. Meanwhile, a desperate American seeks the aid of an elusive ex-military man in tracking down her missing mother, a noted archeologist. When the bad guys make the mistake of crossing the hero, itís trouble in paradise for everyone involved."