London, 1976: A summer of creation, destruction, and blistering heat. Lili Garcia stands at the edge of London's growing punk scene, playing bass with one of the city's wildest bands. The group's success has only strained things between Lili and Curtis Ray, her cool, rebellious boyfriend and bandmate. Lili soon meets William Bonney a guitarist from Northern Ireland. William is as reserved as Curtis Ray is loud, haunted by the life he left behind, but every bit as brilliant a musician. William's quiet confidence moves Lili to search for what she really wants. But the secrets of William's past could mean danger for both of them.