Sinopsis dan Bocoran Ending The Rejuvenation Treatment (1921)

A scientist has invented a serum that transforms the old into young and the old into new. His first subject – a very old man – gets a single injection and gradually turns into a baby. Meanwhile, three little men have stolen the syringe with the rejuvenation treatment, which they now give to men and livestock in dire need of it. (stumfilm.dk)