Saving Susy Sweetchild

Welcome to Hollywood of the 1920s: a world filled with glamour, fake names . . . and the occasional felony!
July, 1924. After nine months of living in Hollywood and working as a companion to her beautiful silent-movie star sister-in-law, young British widow Emma Blackstone is settling into her new role: doctoring film scenarios whenever the regular scenarist is overwhelmed with work, which seems to be most of the time.
Shoots for the Western movie Our Tiny Miracle are in full swing, with little seven-year-old Susy Sweetchild playing the lead and acting most professionally. Maybe too professionally, Emma thinks, shocked to the core when the child star is nearly killed in a stunt scene and her mother - former screen siren Selina Sutton - seems only to care that Susy gets the job done.
But Emma's concerns only worsen when news reaches her that Susy and her mother have been kidnapped. The ransom note says to keep the cops out of it, so...