Before Emma met Ash and Zane fell for Rikki, the two childhood friends had a secret relationship that resulted in a life-changing transformation. Now that Emma's back from her travels and Zane is single, can Emma rekindle their relationship without destroying her friendship with Rikki?

When the four girls go off to University in Cairns, Australia, everything is different. The girls stumble across a strange lagoon, and on the first full moon two old enemies must become allies. Bella feels a strange connection to the lagoon, Rikki's ex wants her back, Emma deals with jealousy from all aspects of her life, and Cleo has attracted the attention of a dangerous man.

Rikki is offered the opportunity of a lifetime: the chance to model for a well-respected agent! Rikki turns down the offer initially, but when she desperately needs quick money she reconsiders. Suddenly, she's thrown head-first into the world of professional modeling. Rikki discovers that beneath the glamour, there's a lot more to modeling than she originally thought.

Cleo, Emma, Rikki and Bella are trapped in different situations when a zombie outbreak hits Australia. Can they find each other and survive?