Xia Yitiao has found his real family. But the meeting with the second elder sister, Xia Wa, turns out to be completely different from what we would like. What if not all members of the newfound family are happy with him? Moreover, it turned out that there are other people with superpowers... Amazing events haunt Xia Yitiao. He discovers that the door in the painting can lead to another world and that the school's swimming star can stay underwater for more than three hours... And then there's a mysterious ghost ship, captained by a fierce captain who calls himself a "sea god" and one last thing an unfulfilled courier mission left by parents who disappeared in time and space...Will Xia Yitiao cope with all the difficulties on her way and be able to become a real courier of Magic Express Delivery?