An affair between a recluse yacht owner and a little known actress gets tangled when they discover one another ambitious tramps who team up to fleece the jet set but recluses ex returns to love with revenge as an IRS sting – SuperTramps

When they discover each other is an overambitious tramp, Two gold diggers who each though the other was a millionaire must... (Do this thing)

I'd remove the Jekyll and Hyde reference and replace it with something else and then extend or 'finish' the sentence after tramp to include what the goal will be after they discover each others true intentions. Add a time-bomb element to it.

Thanks Dpg

Please give some plot ideas that hit you on first thoughts