Man is mortal, and it may be lighter than a feather, or heavier than Mount Tai. A generation of legendary thief Jiang Guanyu, unwilling to betray his motherland, died generously and died with the enemy. The mysterious gold leaf heavenly book took his remnant soul through time and space, and came to An urban world of high martial arts, possessed by a seventeen-year-old boy. He wanted to honestly guard his home and live his own life, enjoying family affection and life. But he also carried a weapon that could steal everything. Thief System!