Lin Mo is a struggling deliveryman in a first-tier city. He rides an electric scooter through the narrow alleys of urban villages and the neon lights of office buildings every day, just to deliver a few more orders to pay for his sister's tuition. Until one rainy day, after he mistakenly delivered a "strange takeout", he suddenly could see the "secret bubbles" hidden in others' hearts - the medicine hidden by the neighbor's aunt on the balcony was for abducted children, the director in suits and ties in the office building had a fake academic degree locked in his drawer, and even an old man who lived alone who often ordered takeout had an unsent paternity test hidden in his home.
At first, he just wanted to pretend not to see it and live a stable life, but when the "secret bubble" pointed to the malicious intentions hidden in the market: unscrupulous merchants using expired ingredients, intermediaries to defraud workers of their savings, and some people even wanted to cover up the truth of an "accidental" death, he clutched the takeout order in his hand and finally couldn't help but stop the car. From then on, the takeaway boxes contained not only meals, but also ignored truths; the route of the electric vehicle also became a track to expose lies. From being a "delivery man" who helps working girls get their wages back, he gradually gets involved in a more complicated whirlpool - there seems to be a "cleaner" deep in the city who specializes in erasing those "secrets that shouldn't exist", and Lin Mo's existence has become a thorn in their side.
When the street lamp in the narrow alley was maliciously broken, and when his sister was "kindly" reminded to "stay away from your brother," Lin Mo finally understood: there are some secrets that cannot be pretended to be blind, and some ordinary people can also rely on an electric car to hold up a light for the weak in the steel forest.