In the Name of Sherlock Holmes (2011)

Two nerdy boys who call themselves Holmes and Watson spend their summer in a sleepy town where children vanish and reappear unnervingly changed, but the oblivious adults notice nothing. When Watson’s solo detective work hits a dead end, Holmes teams up with their friend Ica to crack the mystery. As strange clues mount, the trio races against time to uncover what’s behind the eerie transformations.