K – The Unknown is a 1924 American silent mystery film directed by Harry A. Pollard and starring Virginia Valli, Percy Marmont, and Margarita Fischer.

[2] As described in a film magazine,[3] Sidney Page (Valli), glorious in the beauty and charm of young womanhood, awoke one day to the dazzling realization that she was the object of the affection of two mature men.

Masculine affection was nothing new to her: from her schooldays she had been courted by two youths of her own age, and she had been considered the belle of the small city where she lived.

Dr. Max Wilson (Roche), recently come to assume direction of the new hospital, swept her off her balance by the swiftness of his wooing.

It was her interest in Le Moyne that was responsible for her breaking off sentimental association with two youths of her school days, George "Slim" Benson (Keith) and Joe Drummond (Ryan).