Ubloa arrives at the Healthy Mountain, and meets Blaze and Dr Snorre who’ll teach her how to fight the Invisible Warriors that attack us through cuts and grazes. She learns to clean those scratches with ‘Yellow Wonder’, a soapy sort of potion that eliminates the Invisible Warriors who slip inside us when we hurt ourselves, and finds out how to put on a ‘band-aid’ to protect wounds while they heal.

She’ll take a big book away with her too, a book that explains the formula for Tetanius, a vaccine that we have to put in our bodies to make sure that our own powerful Defenders attack the strongest of the Invisible Warriors, those who can sneak in through cuts and grazes even when we’ve taken every possible precaution.