In the spring of 1400, the year of the Dragon, Ho Quy Ly abolished the Emperor Thieu of the Tran Dynasty, ascended the throne, established the Ho Dynasty, taking the country's name Dai Ngu. Many Confucian scholars of the Tran Dynasty did not obey, and decided to ask for the help of King Minh to send an army to destroy the Ho Dynasty. After nearly 200 years of peace under the Tran dynasty, the Vietnamese people began to sink into the dark and miserable days...

In 1369, King Tran Du Tong died but did not leave any descendants, the supreme power at that time fell into the hands of Duong Nhat Le. Faced with the danger of the family's destruction, Princess Thien Ninh decided to put aside her own enemies and join forces with Tran Phu to march to Thang Long to overthrow Duong Nhat Le and save the Tran dynasty.

In September, autumn, 1406, in the name of "Supporting Tran to destroy Ho", Minh troops landed to invade our country, large numbers, burning ambitions, plotting to cross the waterway to attack Da Bang city. .