Trevethen knew life would get tough after her husband's suicide...but she had no idea just how tough. Left with a manor on the Cornish coast, a mountain of debt and dozens of creditors on her heels, she is about to lose everything. But with Matthew, the manor's caretaker, Grace hatches an outrageous idea: Why not use her renowned green thumb to plant a cash crop and pay off her debts? Soon her greenhouse becomes a hot bed of illegal activity - and business starts blooming. But if the buzz gets too big, these budding entrepreneurs just might have to watch their dreams go up in smoke. Starring Brenda Blethyn and Martin Clunes.