To help his fellow workers recover their owed wages, Ethan Vance accepted Mr. Marcus Thorne's conditions to take the place of Marcus Thorne's son, who caused a drunk driving accident, in jail. Who would have thought that after 5 years, when Ethan Vance was released from prison, he would discover that his family had been persecuted and disappeared. In order to find his wife and daughter, he came to Pi City and started working as a construction worker, using all his time to find his wife and daughter, but unexpectedly encountered new troubles... Various crises slowly approached him at the same time.