Bay Area drama unfolds at San Francisco's Old Mint as the GENEALOGY ROADSHOW team reveals stories tying citizens to the 1906 earthquake, notorious gangsters, war heroes and two brutal murders. A woman who suspects family ties to the Gold Rush learns that a 19th-century workplace murder claimed the life of an ancestor. An Irish-American woman discovers how a devastating earthquake brought her grandparents together. One family's ancestry mirrors American history, with familial ties to both the Revolutionary and Civil Wars. A Chinese-American woman finds out the truth about her family's ties to Chinatown gangster "Big Jim" Chin, and family heirlooms connect a man to the sole survivor of the 1860 Wiyot Massacre.