Gavin leads the survivors in trying to find Eve, Josh and Riley in a final attempt to reunite his family and find a way back to the lives they once knew.
After the clearing's destroyed in a dinosaur attack, the survivors must find a new home; Gavin discovers a clue about where Eve has been taken, but tracking the lead down results in even more tragic consequences.
With Gavin on the verge of dying, Eve and her family make a desperate attempt to set things right -- even as an unexpected twist threatens to tear them apart forever; Veronica reveals a secret that sends her relationship with Lucas into jeopardy.
