Upon superstitious headmaster Mordred's orders, the returning students and new lasses of Dragon Slayers' Academy deck themselves in lucky charms on Friday the thirteenth, but luck may not help when a wicked dragon arrives seeking revenge.

Seventh-grader Freya June Sun is obsessed with Chinese superstition and signs she believes are from her late father, but an unexpected partnership with a classmate leads her on a path of self-discovery as she learns to rely on herself for luck.