A cold case is blown wide open and Detective Jess Savage is discharged from hospital, intent on solving the mystery of a missing boy.

Who and where is Lucy? Jess is running out of time to piece the puzzle together. Meanwhile, Ruby is hiding something.

Max Lee wants answers about his missing daughter and Jess must take the case. Ruby has some news and something gruesome is discovered in the mangroves.

Ruby goes missing, and it’s a race against time for Jess and her team to locate a missing body and find their murder suspect.

The investigation finally falls into place and Harding steps up. Ruby has the final piece of the puzzle, but someone else knows Jess's secret.