Oscar-nominated director Guillermo Del Toro has come under the scanner for his latest movie 'The Shape of Water', after the son of celebrated playwright Paul Zindel said that the movie's plotline is obviously derived from his 1969 play 'Let Me Hear You Whisper'. David Zindel, son of Pulitzer Prize-winning playwright Paul Zindel, has slammed Fox Searchlight and Del Toro for developing the movie without seeking rights to the idea, reports The Guardian. He said, "We are shocked that a major studio could make a film so obviously derived from my late father's work without anyone recognizing it and coming to us for the rights¿. ¿A lot of people are telling us they are struck by the substantial similarities. We are very grateful to Paul Zindel¿s fans for bringing this to our attention", added David.