Eureka is suffering through the first months without her mother, whom she lost in a car accident when a wave crashed and pushed them off of a bridge. She barely made it out alive herself. In the aftermath, dealing with an abominable stepmother, she leans on her best friends Cat and Brooks. When a mysterious boy named Ander crashes into Eureka's car and life, things become complicated. Eueka finds out her mother left her items in her will, things that have very important implications. A locket, a thunderstone, and a book with a story of two lovers in Atlantis are what she gets.
Becca and her best friend, Val, are part of the minority at their school; they are single. Val wants to change this, but Becca is a cynic. Becca can't trust in love after her sister was left at the altar, which is also why she started up a business on the side, being the Break-Up Artist. People pay her to break up couples. When she is hired to break up Huxley, the most popular girl in her school, who also just happens to be her old best friend, she is up to the challenge. However, along the way of befriending her enemy, Huxley starts to open up and genuinely like Becca again.
The two main characters, Mo and Annie, are in trouble when Mo’s family is faced with moving back to Morocco. They’ve been inseparable for years, through Mo’s first couple months in the States and Annie’s recovery from the fate of her sister. These friends are close, but neither could ever think of the other romantically. However, they may need to change that if they want to keep Mo from leaving. The fine lines between right and wrong, loved and caged, and selfishness and independence are shown throughout the story.