What important story does this poem in "Mrs Xiang" tell us?

This article tells the story of my love for Mrs Xiang.

Mrs Xiang landed in Zhou Bei,

I'm already very sad and I really want to see it.

The cool autumn wind bursts in,

Dongting Lake is choppy and leaves are swirling.

Climb up the highland full of wild flowers and overlook,

Make an appointment with her to prepare dinner.

Why do birds gather in aquatic plants?

Why are fishing nets hanging on the top of the tree?

There are angelica dahurica in water and orchids in Lishui.

I miss Mrs. Xiang, but I dare not say.

Looking around, it is vast.

I saw the clear water gurgling.

Why do elk in the mountains feed on the courtyard?

Why are dragons stranded by water in the abyss?

I rode along the river in the morning,

In the evening, I crossed the water to the west bank.

I seem to hear the beauty calling me,

I want to drive with her at once.

Build a unique palace in the water,

It is covered with lotus leaves.

Decorate the atrium with mushrooms and purple shells,

Sprinkle pepper all over the hall.

Taking Yugui as the rafter of Liang Mulan,

Magnolia uses Angelica dahurica as the lintel to decorate the room.

Weave Ficus pumila as curtains,

Then hang the grass on the eaves.

With a white jade banquet,

Give off the fragrance of Shi Lan.

Lotus leaf roof repaired by angelica dahurica,

Surrounded by Du Hengcao.

Collect herbs, fill the whole courtyard,

Let the porch smell the incense.

Greetings from the gods of Jiuyi Mountain,

They gathered together like clouds.

Throw my sleeve into the Xiangjiang River,

Leave my thin coat on the bank of Lishui River.

Du Ruo was collected from an oasis in the water.

Give it to lovers far away.

Happy times are hard to come by,

Let's just be happy.