Nancy Drew and the Hidden Staircase (1939 Movie)

Nancy Drew and the Hidden Staircase is a 1939 American mystery film directed by William Clemens and written by Kenneth Garnet.

Elderly sisters Rosemary and Floretta Turnbull want to donate their mansion for a children’s hospital. However, their father’s will states that at least one of them has to stay in the house every night for twenty years before they can inherit the estate; there are two weeks left to go…