The Schemers (1922)

A research chemist with a drug company, is close to success in his attempt to develop a chemical substitute for gasoline. Juan Bronson, who is the private secretary of, the president of the company, conspires with to steal Paul's formula. Believing Paul to be carrying the formula, Bronson and Anderson kidnap him, but the papers are not on his person. Paul manages to call Isobel Benton, his sweetheart, and instructs her to go to his laboratory for the papers. Anderson overhears the conversation and also goes there, but Isobel outwits him and gets away with the formula. Anderson then frames Paul for the theft of some other important formulas, and Paul gives his formula back to Isobel for safekeeping. Anderson abducts Isobel, and Paul rescues her with the help of Davidson and a detective. Isobel proves Paul's innocence, and the detective tells Davison that Bronson and Anderson are notorious criminals, wanted by a South American government.