Li Ming is an ordinary delivery boy living in a modern city. He shuttles through the streets and alleys of the city delivering food every day, but his income is meager and he is saddled with huge debts (perhaps due to family illness, business failure, or betrayal by friends).
The turning point: While delivering food, his electric car had an accident due to a leakage of electricity, causing him to fall into a coma. After waking up, he found that he was back in 2015.