After Grace's husband dies from falling out of a plane, Grace (Blethyn) learns she's been a fool. In her paradise of a Cornwall country home outside the sweet village of St. Isaacs, everyone else knew her louse of a husband had a London mistress. Grace, who heads local committees and lives for her garden, is suddenly bankrupt, owing money she has no way to come up with, and she can only worry what will become of her garden. But Matthew, the gardener (Ferguson, who also co-wrote the movie), has a solution. His few marijuana plants, growing at his second job site -- the vicarage -- can't flourish in the shade. Grace offers to move them into her greenhouse, and before long, the pair are raising dope wholesale, hoping to earn enough to pay their bills and then some.

Set in the kind of village shown in many U.K. comedies that have had a recent renaissance, the movie shows kind, eccentric local characters who all know each other and look the other way at small, harmless, funny sins. You'd never want to leave so friendly and charming a place, where modern horrors don't exist, as Grace only vaguely grasps when she arrives in London alone to sell her harvest.

As middle-aged, Grace, dressed in a respectable white summer suit, looks for urban customers, she meets small-time dealer Vince (Bailey), who realizes he's in over his head when it turns out Grace has a lot of high-quality marijuana: "I have to go get my daughter from her flute lessons." A bigger dealer, Jacques (Karyo), who tries to threaten Grace, is disarmed by her. The setup of the movie is fun, and Blethyn helps by being not just a helpless innocent but a smart woman who depended too much on her husband and now quickly learns to cope.