Liu Gan, who was in college, could have lived an ordinary life, but after the age of 20, he was destined to have a rough fate. He suffered many hardships and came close to the truth again and again! Fighting against evil spirits, being remembered for his extraordinary body... Traveling between the Yin and Yang realms, and being involved in an unprecedented conspiracy. Fortunately, there are still two yin and yang ghosts who help, so how will Liu Gan unravel his family's life experience step by step? Or maybe this is the fate of the family itself...