Good Friday, 1939, and T., a sixteen-year-old schoolboy, arrives at the Smithsonian Institute in Washington. The museum is closed, but T. manages to slip in, and it would appear that somehow, he is expected. An old man, Bentsen, shows him around, and T. realises that all is not as it seems. As he goes to examine a Native American exhibit, he is drawn magically into the nineteenth-century world of a reservation of Sioux Indians. They like what they see of T. and immediately get the pot boiling. T. is forced to take refuge in the tent of a young Squaw. They become lovers, and she helps him to escape back to the safety of the Smithsonian.