The goal of the explorer was a main plot in Battle Through the Heavens. In the novel, the protagonist Xiao Yan became a top expert in the Dou Qi continent and embarked on a journey filled with hardships and dangers in order to find a way to increase the strength of the Dou Qi continent. In the end, he achieved his goal and pushed the development of the story together with other characters. The complete set referred to the entire story of the novel 'Fight Through the Heavens' including Xiao Yan's growth experience since he was a baby, his adventures on the Dou Qi continent and the story lines of the other characters. The 'side story' referred to the continuation of the novel that was added to the story. It mainly described the challenges and new adventures that Xiao Yan faced after achieving his goal as an explorer. If you want to know more about the explorer's goal, you should read the novel Battle Through the Heavens or look up related materials.