Please answer the following question: I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: Saving Grace Movie plot: The first scene shows Matthew Stewart digging a grave for Grace Trevethyn's husband, John (Bill Weston), who has committed suicide. His now widow, Grace (Brenda Blethyn), an English woman living on a beautiful large estate, learns, upon his death, that John's debts had mounted to the point that her assets (home, car, garden) will soon be repossessed. The postman (Bill Hallet) keeps on bringing her more threatening letters from banks, credit cards... and he also tells all the townspeople about her problems. One of John and Grace's friends, Dr. Martin Bamford (Martin Clunes) tells her that everybody knew more or less that John was doing something fishy financially, but nobody wanted to interfere in his business. With desperation, Grace realises that all commercial schemes by her late husband were failures, and that they even had a secret account in Sweden, but with nothing in it.With no assets of note and no source of income, she watches helplessly as the process begins, and when her high-tech state-of-the-art lawnmower is taken away by some movers (led by Johnny Bamford), she must fire her gardener, Matthew Stewart (Craig Ferguson), to whom she is close. When she stumbles upon the fact that Matthew is not having much success growing some weed plants in the fields of the local vicarage because of the lack of sunlight and heat, feeling awful about having fired him, she suggests that he move his plants to her greenhouse.The plants begin to grow impressively, and Grace, quite innocently, asks Matthew what the plants are worth. The news that they are illegal marijuana plants that are quite valuable on the open market gives Grace an idea, one that might just save her from having her estate repossessed by the bank. Mass production of marijuana plants begins in Grace's greenhouse. Matthew's girlfriend, hard-working fishing boat captain Nicky Tristan (Valerie Edmond) wants no part of the plan. She wants Matthew to grow up, settle down and start taking responsibility for his own life. Some of the locals suspect what is... My question: What was the title of Grace's book?
A:
The Joint Venture