In Chicago, Christie and Agatha meet composer Florence Price at a small gathering. But any hopes the twins have of hearing Miss Price play are quickly shattered - much like the host Mrs Bond's wrecked piano!
When Shanti Swaroop Bhatnagar receives a threat that his science exhibit is going to be stolen, Christie and Agatha's Detective Agency is hired to investigate.
Aboard the Green Express, it's up to Christie and Agatha to uncover a plot to sabotage physicist Albert Einstein's radio broadcast before their journey ends.
Many are unhappy about Mr Alexander Jr's daring drive to the summit of Ben Nevis, but who is trying to sabotage the record-setting expedition? Willing passengers Christie and Agatha are keen to embark on a rip-roaring adventure, but soon they're embroiled in a thicker plot than they bargained for.
When Agatha accidentally eats a major scientific discovery (hidden in a sandwich!), it's a race against time for twins Agatha and Christie to find out who's trying to ruin physician Sir Alexander Fleming's reputation.
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