Ouyang Chen runs an antique shop called "Chen Guxuan", but it actually hides a secret - the ink jade pendant on his chest contains a mustard space that can be used to store items and hide people. Three years ago, his childhood sweetheart Su Wan disappeared mysteriously. During the past three years, he used an antique shop as a cover to investigate secretly while waiting for the opportunity to reunite. By chance, he met Su Wan again in the store, only to find that her memory had been tampered with and she could not recognize herself. She was accompanied by the mysterious business upstart Lu Ziqian. As the investigation deepens, Ouyang Chen uncovers the conspiracy of the "Gate of Memory" organization represented by Lu Ziqian - they covet Su Wan's "memory physique" and conduct cruel memory modification experiments. Behind this are the ancient "Tianshu Pavilion", the inheritance of the Origin Keepers, the cross-world "Lord of the Void" and the Shadow Clan and other evil forces. In order to save Su Wan and avenge Su Wan's father Su Jianguo, Ouyang Chen teamed up with the "Dawn Organization", Shadow Hunter Ling Yue, Professor Chen, a descendant of the Source Keepers, and others to track down from the city to the Kunlun Ruins, and then traveled to the Purple Dome Realm. After three trials of courage, wisdom, and original intention, he unlocked the advanced abilities of the Mustard Seed Space, found the Heart of the Purple Dome, fought against the core power of the Lord of the Void, uncovered the secret of the Origin Keepers' betrayal, and embarked on a battle of guardianship across two worlds.
