This film is adapted from the autobiographical novel by the late Irish genius writer and painter Christy Brown. Kitty (Daniel Day-Lewis) was born with cerebral palsy and physical disability, and only his left foot can be as flexible as normal people. He has no ability to take care of himself, which has brought a great burden to his family. When he was young, he was always ridiculed by the children around him. His father almost gave up on him, but his mother (Brenda Fricker) has always taken good care of him and never left him. Kitty was depressed but could not express it in words. He tried to write and paint with his left foot. Gradually, with perseverance and wisdom, Kitty was increasingly recognized. His mother secretly bought a wheelchair for Kitty, and then he received free help from Dr. Elaine. Under Elaine's exercise guidance, Kitty's health began to improve. At this time, Kitty had already fallen in love with Elaine. One day, Elaine recommended Kitty's paintings to a friend's gallery for exhibition. After the end, Kitty expressed his love to Elaine, but was rejected by her...