An incredible secret and an impossible love that transcends all boundaries. The mystery success of Guillermo del Toro. A secret U.S. military laboratory in 1963: In the highly secured lab section F-1, a creature from the Amazon is being held captive, with its research intended to provide a breakthrough in the Cold War arms race. But one night, the cleaning lady Elisa discovers the being, which is half man and half amphibian. The mute young woman does something no scientist has thought of: she teaches the water creature sign language. When she learns that the "project" is soon to end up on the dissection table, Elisa must risk everything to save her friend. The new masterpiece from cult director Guillermo del Toro - the novel adaptation of the award-winning blockbuster.