Sharon Carter of Mars

In 1878, Shannon Elizabeth Carter is sent to New York to see her Aunt Sharon Carter, who had sent to see her suddenly out of the blue. Upon arrival to New York, Shannon is informed that her aunt had died suddenly the day earlier. Per instructions, Carter's body was put in a tomb that could only be unlocked from the inside, and there was to be no funeral. Her attorney gives a personal journal of Sharon's for Shannon to read. Shannon hopes the journal her aunt left behind will explain Sharon's sudden death.