Sephie and Callum have been in love almost since childhood, but their union is forbidden because the society they live in is divided into two classes. Sephie belongs to the higher class of dark-skinned Crosses, while Callum is a white boy from the lower caste of Zeros. Maintaining a relationship becomes even harder when it’s revealed that Callum is connected to the Liberation Militia, which is trying to overthrow the ruling elite. After all, Sephie’s father is a high-ranking official…