The Joyous Liar(1919)

Everyone hates a liar, but when it is done to protect a girl's name -Well that's different.

Burke Harlan an artist, saves Anne Warren from auto thieves, but he is wrongfully arrested and accused of stealing her car. The girl's father is a criminologist and has Harlan released into his custody as he would like to try to reform the young man. Harlan finds this highly amusing and goes along with the idea, mainly because it will allow him to be nearer lovely Anne. He does his best at convincing he is a delinquent, however Anne has a beau who is the police commissioner. But the clever Harlan outwits everyone and elopes with Anne before revealing his true identity.