By day, Tilly works diligently at Doctor Tapper's medical clinic as his assistant, and cares for three orphaned children by night. Her busy life is interrupted one day, when Doctor Tapper's nephew Harry drops by. Harry is handsome and capable. As a doctor himself, he takes over the clinic when Doctor Tapper takes ill. His fancy, new-fangled ways don't sit well with the patients in the poor neighborhood. As Tilly works closely with Harry, she finds herself torn between tradition and innovation, effectivity and kindness...