Teenager Mary dreams of writing, but has yet to find inspiration. When she meets poet Percy Shelley, it is love at first sight. But Percy has his secrets, he is married with a child. Setting up home together, Mary soon becomes pregnant with Percy’s child, a daughter who tragically dies. Ostracised by polite society and grieving for their child, they escape from London and Percy introduces Mary to Lord Byron at his house in Lake Geneva. On a stormy night, Byron suggests they all write a ghost story. Mary gives birth to Frankenstein’s Monster. It is brilliant, but women don’t write books, and publishers won’t print them. And so Mary fights for her creature and her identity, all at the age of eighteen.