After accidentally picking up an old and ownerless mobile phone, Lin Mo discovered that it could actually answer calls from the underworld.
On the other end of the late-night call is the soul of a dead person who died unjustly, the broken body that sank to the bottom of the river, and the girl who died in vain at the end of the alley.
If you answer the call, you will be able to clear the grievances of the deceased; if you refuse, bad luck will follow you.
From then on, Lin Mo relied on this mobile phone to travel between yin and yang, clear the wrongdoers, bring the evildoers to justice, and step by step uncover the strange truth hidden in the shadow of the city.