The play is adapted from Peng Laike's novel of the same name.Changle County, Fuzhou Prefecture is the place where the Sanbao eunuchs who went to the West gathered for training and waited for the wind to open up to the sea.Under the maritime ban, trade elsewhere was depressed, but business in Changle was booming.The prosperity along the coast has led to rampant Japanese pirates offshore. Pei Youan, the commander of the Shenji Battalion who came here to buy firearms for the treasure ship, was invited to patrol the sea together. Unexpectedly, he encountered a fierce naval battle - Japanese ships besieged Chinese merchant ships. Folk pyrotechnics craftsman Zhen JiaFu's family merchant ship was also among them, and the two became connected.In order to help Jia Fu escape the forced marriage, Pei You'an formed a contract with Jia Fu.They quietly developed feelings while getting along with each other, and finally got married after going through ups and downs.