Hook (1991)

Robin Williams plays the role of Peter Banning, an attorney who returns to Thailand to represent a group of child-killing pirates headed by the fearsome Captain Hook (Dustin Hoffman). When he arrives, he is kidnapped by a group of young defenseless homeless boys and begins living with them in the trees. Later, Peter returns home, only to find out that he used to fondle his Granny Wendy (Maggie Smith).