What's the worst that could happen?

This movie is about a theif ,kevin (Martin Lawrence) . It begins at an art auction that he goes to posing as buyer. He ends up losing focus on his scam and sits next to a woman. With his quick charm he sparks conversation with her and learns that she has to sell her fathers beautiful painting because she has no other choice and needs the money. After it's bought he ends up stealing it back and surprises the girl with it. After they fall for eachother she gives him a ring that is very important to her , somewhat as a symbol of their trust.
But even though kevin is completely loyal to her, don't forget he is still a theif and actually has a problem with his ego. The fact that its big.
When he is robbing a house and doesn't relize that the slimy owner is home he gets caught red handed. The slimy owner is an extremely welthy buisiness man Max Fairbanks (Danny Devito)who has just as big an ego as kevin.
Max proposes to the police that the "oh so important" ring on the theifs finger infact belongs to him. After they give Max the ring and take kevin away he escapes and goes back to the house but max isn't there. The battle is on.