"Brokeheart Syndrome. An illness that causes one person to share a heart with three. The body responds to this by causing the diseased to have a mental illness, which in turn forces the diseased to do whatever they tell them too. Or else."

Carmen McDarm has known that she'll never be normal as long as she's been alive. It's been in her brain for as long as she can remember. But when she starts hearing this strange voice in her head telling her to do certain things or else, she's scared to the point where she questions what's even the point of going on.

Dasha Wesley has been an honour student since she discovered it was even an option. Collages are begging her to come their way, and she's able to achieve whatever she wants when she wants it. But when she starts hearing a voice in her head that makes her do things that she doesn't want to do, she begins worrying that all her studies were pointless.

Bailey Griffon can't imagine a moment where she's not in the water. She's been surfing since she could stand; her entire life is on the sea. But when her health gets in the way of her only love in the world, she's determined to fight back, no matter the cost.

Three girls. Three worlds. One heart.