Lights in the sky. Magnets and letters. Old friends and new.

Coming back from a Sunday at the seaside, Evangeline and her family witness three strange lights darting across the sky, manoeuvring in a most peculiar way.
Melbourne is abuzz with rumours but who is behind the mysterious lights? Could it be an invasion? A runaway airship? Or visitors from further afield?

Luckily, Evangeline Caldicott is on the case, determined to uncover the mystery and unravel a few family secrets along the way. With help from her latest inventions and raspberry tarts, of course.