Tracey McBean has a flair for the sciences. Actually she's an obsessive inventor of considerable genius, whose time-saving ideas and contraptions generally just cause havoc. Tolerated by her bemused family, and assisted by her friend and sidekick Shamus Wong, Tracey is likely to be cooking up a machine to fool her parents into thinking it's still summer so she doesn't have to go back to school, or something equally sensible.