Richard discovers his library books have been 'borrowed' by Master Frown, so he sets off on a crazed mission to return the books before they're overdue.
When Unikitty accidentally invokes an ancient curse, the gang must beat Master Frown and Brock back to the castle to avoid getting turned into rotten eggs.
Master Frown and Brock attend a friendship-themed competition intending to ruin it for everyone else, but soon discover their own friendship in need of repair.