Flying Colors (1917)

Brent Brewster, formerly a Yale athlete known for his pole vaulting prowess, is unsuccessful in business. When his wealthy relatives send him out to fend for himself, Brent joins a detective agency. After Craig Lansing, a family friend, hires Brent to investigate the numerous jewel thefts in Poughkeepsie, Brent works undercover at Lansing's house party and recognizes Captain Drake, an English crook. Although Brent temporarily forgets detective work when he meets Ann, the beautiful sister of Lansing's wife Ruth, Ann's remark that $40,000 a year would be enough for her to live on brings Brent back to the job.