They say, "bury" is for the deceased to find a peaceful mind place, and the place of heart returning of the departed mother has always let her daughter cruising. The abstraction of thoughts in daily life, the conjecture of mothers in different time and space, and the endless search for the dead also are indexes of daughter’s heart. Where on earth has mother gone? How does a daughter perceive a distant relative? Through the mouth of the mysterious people, to explore the unknown space.