Grace has just lost her husband, which is sad enough, but she has also discovered that he has left her in debt of thousands of pounds. Faced with losing all of her belongings and her home, Grace turns to the only thing she has left: her skill as a greenhouse gardener. She and her handyman Matthew hatch a brilliant marijuana-growing scheme. But are they doing the right thing? Can Matthew's girlfriend put up with this kind of illegal antics? And finally, once they grow it, can they even manage to sell the stuff?