This is the sequel to "Trailblazer The Rescuer". After two months have passed since the events of the prequel, The Main Six end up having coltfriends with other ponies. However, Twilight Sparkle cannot seem to find one for her life, and suffers anguish that he constantly oppresses to keep herself from looking unhappy all the time. Trailblazer then offers to take her to his hometown of Tethleon to find one for her, but their progress is abruptly stopped when a hole in the sky is spotted.
It turns out that the hole is called a Sario Hole, and if it is left untreated, the world will be destroyed. During their research, Princess Celestia informs them of a region called Inyomaid, a technologically advanced island with a futuristic feel. On that island, the keys to closing the Sario Hole are located there, and all must be brought together to stop it.
While they are adventuring through the region of Inyomaid, Twilight seeks comfort from Trailblazer from time to time. She reveals to him that she once had a unicorn coltfriend when she was younger, named Mineral Mage. But the whereabouts of where he is now will surprise her...

Rated teen for mild language.