Dreams are the link to what links reality to the deepest thoughts within our subconscious. They can even provide a link between two individuals and the world around them. Blythe Baxter and Rainbow Dash discover that friendship takes many forms as do the people they know when their minds are swapped by an unknown force.

Now, the pair are forced to work together to save each other's minds to preserve their sanity and treasured memories or valuable relationships will be lost.
Together, they must fight what they cannot see or lose what they can see.

A My Little Pony: Friendship is Magic and Littlest Pet Shop crossover.