Two young collegians, Anthony Markham, an enigmatic person, and Alan Strange, whose temperament is the direct antithesis of his friend, compete for the honors of swimming. Both men are aspirants for the hand of Rosalie Latimer, the daughter of the banker, Latimer, to whom Alan is the confidential secretary.
| Actor | Role |
|---|---|
 Charles ClaryLocksley - the Detective | Locksley - the Detective |
 William StowellAnthony Markham - the Water Rat | Anthony Markham - the Water Rat |
 Thomas CarriganAlan Strange | Alan Strange |
 Frank WeedMr. Latimer - the Banker | Mr. Latimer - the Banker |
 Lafe McKeeWatson | Watson |
| AAdrienne KroellRosalie Latimer - the Banker's Daughter | Rosalie Latimer - the Banker's Daughter |
| PPalmer BowmanLord Monteagle | Lord Monteagle |
| AAlma RussellLady Monteagle | Lady Monteagle |