Every garden has its secrets...

Eustacia Rose is a Professor of Botanical Toxicology with only her extensive collection of poisonous plants for company. Her life is quiet, her schedule is unchanging, and her closest friends are the specimens she tends to. But she does have one other hobby: watching her neighbors through her telescope, taking extensive notes on their lives for research.

When Eustacia hears a scream one evening, the temptation to investigate proves irresistible. Through her telescope, she catches a glimpse of her extraordinarily beautiful new neighbor, Simone, and soon becomes obsessed with her and her life. But who are these four men that orbit Simone? And why does Eustacia get the feeling she needs to protect her from them?

One day, Eustacia comes home to find her precious garden destroyed and learns that someone close to Simone has been murdered with a rare poisonous plant. As she is drawn deep into the crime, Eustacia's closed-off life begins to crumble, forcing her to break free from the walls of her secret garden and take matters into her own hands. Soon, she's forced to realize that the world is filled with people who are just as toxic as her plants...