Plaintiff attorneys are an optimistic lot who can't be bothered with the rules and the law, often. It is a depository issue to a tortious interference with contract case that you don't have a contract. As this sort of putative contract is covered by the statute of frauds, a written contract is required. If they had one, they would have attached it.
The other counts aren't quite as clean but it's still sort of the same thing. In fact they're just trying to use those other counts to get around the fact that they don't actually have a contract in their hand from either Miami or Florida.
The amount of detail in the complaint makes me doubt that they had anything more that they're keeping in their back pocket.