Has sibling rivalry gone too far?

Sisters Hannah and Harper are close. In age, in their relationship, and in competition.

Hannah, 14 months older, has a PhD in Mathematics, a prestigious high-tech job, and the most perfect boyfriend. If she could just build the perfect life, she might just win their sibling rivalry.

Harper might have been born second, but she’s racing to reach every milestone before her sister.

When tragedy strikes, the sisters question their motives for every move: was everything just to be the better sister?

Above all, the sisters love each other. But some secrets are too deep, even for the Green sisters. When both of their lives seem to fall apart, will they be able to put their sisterly competition aside? Even if it means revealing their darkest sides?