i have never read sarah water book . although i have not read the book and the 3 hour movie be very interesting . it begin with an interesting storyline with a twisted end . i have to say these 2 actress be amaze . sally hawkins be stun successfully portray the character in love with her mistress and betray by her love . their romance slowly blossom a they spend more and more time together . the love make scene be very tender and emotional and well act . the end be quite intriguing and these 2 end up together after all they have be thru and which be a bless . overall and it be a great movie to see and a very interesting plot with excellent performance .