Ma Liu, a coolie who was born in the market, unexpectedly got a chance. The highlights of the plot are the absurd setting of "everything can be sent" and the funny letter "the process always goes astray" (after sending it, I have to help write a reply), from sending a cucumber to the noble concubine in the palace (results as an assassin), to sending a false intelligence to the enemy general (accidentally sent it as a real map). Every mission is a high-flying adventure. Ma Liu relies on his market wisdom and the weird props rewarded by the express bag. Under the pursuit of female agent Liu Qingyi and the siege of all forces, he is always able to save the day and complete the mission in an unexpected way. In the end, from a low-level person, he gradually builds a huge express network covering the entire dynasty and even the realm of gods and demons, and becomes the legendary "King of Express Delivery".
