Sixteen-year-old Samantha Cross is introverted, highly sensitive, and is falling in love for the first time. The biggest problem? The guy she's falling for is her older sister’s boyfriend, Ben Swift. Her sister Veronica is beautiful, outgoing, and confident. Samantha is used to her sister getting all of the attention and everything she wants, even if she's never liked it. But now they’re being torn apart by love for the same boy, their parents’ separation and mother’s declining emotional state, and their move away from Calmer Cove into city life in St. John's. As her life crumbles apart around her, Samantha’s feelings for Ben only grow stronger. Then she finds out the boy driving the vintage Thunderbird has mysterious issues of his own. Will Samantha let Veronica keep the only boy she’s ever loved, or will she end up ruining her sister’s happiness to take control of her own? Tensions between the siblings escalate, and Samantha is torn between doing what she thinks is right and acting on her heart’s desire. One thing becomes clear: One of the Cross sisters is in for a broken heart.

Samantha Cross is all grown up, busy with art school, and free of romantic entanglements. That's how she prefers it, having renounced love ever since Ben Swift came between her and her sister Veronica four years ago, changing their lives forever. Quite the opposite, Veronica rides the dating circuit with every eligible guy she meets. The rift between the sisters is still intact, troubling Samantha and raising questions about Veronica's lifestyle choices. But when an old friend turned sexy bass player rocks Samantha into a wild infatuation, she rethinks her abstinence. While feeling out this intense relationship, Ben barges back into their world with devastating news, sending both sisters into a tailspin. Is Samantha fated to fall under his spell again, or will she side with Veronica against dire new threats facing their family? In an explosive climax, Veronica reveals long-buried secrets of her own, secrets that could impact all their futures and any hope of reconciliation between the Cross women—a.k.a. the Calmer Girls.