Ema Vašková has always been extraordinary. The twelfth child in her family, born on the twelfth day, of the twelfth month as the clock struck twelve, she is fascinated by shadows and has a very particular skill for sneaking up on people - much to the bewilderment of her parents and siblings.
When Ema is sent to stay with her eccentric, bicycle-making Uncle in Prague, she meets Silvie - a girl just as extraordinary as Ema. Together they befriend bats, trawl treasures from the river and establish one firm rule: adventures are best served at midnight.
So when Silvie goes missing, Ema is determined to find her. Even if that means facing her darkest fears and infiltrating a very peculiar secret society known as The Midnight Guild . . .
Way back in the autumn of 1880, five babies are discovered at the Little Tulip Orphanage in most unusual circumstances. Those babies are Lotta, Egbert, Fenna, Sem and Milou. The vile matron calls the children 'the unadoptables' but this talented gang of best friends know that their individuality is what makes them so special – and so determined to stay together.