When Hua Mulan, a female general from the Northern Wei Dynasty, parachuted into the university for military training, she had to use the identity of "Mu Xiaolan" to complete an unknown expedition within 21 days. Standing in military posture, five kilometers, shooting assessment - every "military order" is more dangerous than the battlefield. The scrutiny of the stern instructor, the tracking of the mysterious senior, the provocation of competitors, and the secret of time travel that may make her irreversible. When a fire suddenly breaks out, she discovers that this peaceful world also needs protection. Codenamed "Mulan", a military training survival battle spanning a thousand years.
