After the Qin dynasty united the mainland, they built the Great Wall to prevent the invasion of the Huns from the North. The whole court put their efforts into building the Great Wall but they made the people suffer because of that. Wan Xiliang and Meng Jiangnu were a happily married couple but Wan Xiliang was captured to build the Great Wall and passed away while working. Solar and Solar Junior embarked on a trip to the Great Wall in order to help Meng Jiangnu fulfil her wish. What will they encounter on their journey? Can they help the couple reunite? How is the tour guide related to this tragic love story?