The Fair Pretender (1918)

Sylvia Maynard is a stenographer for a theatrical producer and tries to prove to her boss, that she can act by posing as a society woman at a lavish house party. Don Meredith, the struggling playwright who wrote the work in which Sylvia wishes to star, also masquerades as a famous writer at the party in order to prove that the central thesis of his play is valid: that one can pose in any role in high society and get away with it. Sylvia, introduced as the widow of Captain Milton Brown, falls in love with Don, but her joy turns to panic when her supposedly dead husband suddenly appears. The amused captain allows Sylvia to continue her impersonation for a time but advises her to leave the party. Don, heartbroken, also leaves, but after several adventures in which he helps Sylvia retrieve papers stolen during the party by a German spy, the two lovers are reunited in their true identities, and the play debuts successfully.