People live for dozens of years, to the middle-aged, always because of the pressure of life, the setbacks and complain, only for the past missed opportunity and regret, but this in no dream life, just like a fish life what is the use? The protagonist in the experience of life at low tide the karma to be obtained under changed the historical opportunity, but history rewritten, life is not better, this makes the protagonist realized, and regretting the past, better grasp now, living in the moment.