While participating in a Revolutionary War reenactment, Frank and Joe learn that there has been a real casualty and set out to investigate the incident.

The first national museum whose mission is to illuminate for all people, the rich, diverse, complicated, and important experiences and contributions of African Americans in America is opening. And the history of NMAAHC--the last museum to be built on the National Mall--is the history of America. The campaign to set up a museum honoring black citizens is nearly 100 years old; building the museum itelf and assembling its incredibly far-reaching collections...