Gavin Patterson's TV Garden Makeover show is in need of a desperate boost of ratings so he hires yacht's woman Quinnie Dorell to present the show.

Quinnie's knowledge of gardens however, isn't terribly good so she asks Rosemary and Laura to come and help her present the program.

Events take a nasty turn when Rosemary falls from a scaffolding tower in a sabotage attempt seemingly aimed at Quinnie. Soon after, a young visiting journalist named Rosie FitzCarron is found dead in the secluded lake, but why...