Like his great-great-great uncle, the early geneticist Gregor Mendel, Dr Benedict Lambert is struggling to unlock the secrets of heredity. But for Benedict the mission is particularly urgent and personal, for his is afflicted by achondroplasia. He is a dwarf. When a chance meeting leads him to the acceptance that he craves, he begins a journey towards correcting the injustice of his own capricious genes, with devastating consequences.