When child protection worker Dana Gibson arrives in the sleepy rural town of Killarney, she has one goal in mind - locate the whereabouts of foster child Jayden Maloney and return him to care. What she isn't anticipating is an unexpected attraction to her colleague's younger brother Sean, or to become embroiled in their simmering family feud.

When criminal allegations surface against a member of the local parish and a police task force discovers an increase in drug trafficking across the border, Dana is forced to consider that Jayden's disappearance is not simply a case of a teen on the run. To complicate matters further, torrential rain leads the Condamine River to break its banks, and the town gets cut off.

As Dana continues to ask questions, tensions peak with the rising flood waters and she soon realises that the tightknit community is not all that it seems. As long-held secrets start to unravel and loyalties are questioned, Dana must make a decision about who she can trust and how much she is willing to fight for what she believes in.