A mad scientist crosses plants with people, and the results wind up in a sideshow.

As a surprise, two horse owners decide to ride their animals themselves in a steeplechase. But Bill Davidson's horse "Admiral" behaves weirdly, and falls hard after an obstacle. Bill dies from his injuries. His friend Alan York suspects the animal was doped by unscrupulous bookies and starts to investigate. He doesn't know how serious his opponents are, and that he's in danger to suffer the exact same fate as his friend.

In the Paris of the 1910s, brash young sculptor Henri Gaudier begins a creative partnership with an older writer, Sophie Brzeska. Though the couple is 20 years apart in age, Gaudier finds that his untamed work is complemented by the older woman's cultural refinement. He then moves to London with Brzeska, where he falls in with a group of avant-garde artists. There, Gaudier encounters yet another artistic muse in passionate suffragette Gosh Boyle.