Liv doesn't have a lot of fond memories of her father, who fled to Greece when she was only eight. What Liv does remember is their shared love for Greek myths and the lost city of Atlantis. So when Liv receives a postcard from her father explaining that National Geographic is funding a documentary about his theories on Atlantis, and asks her to fly out to Greece and help, she jumps at the opportunity. But when she arrives, things are a little awkward. There are so many emotions that flood to the surface after seeing her father for the first time in years. Yet Liv doesn't want their past to get in the way of a possible reconciliation. And that means diving into all that Santorini has to offer, the beautiful sunsets, the turquoise water, the hidden caves, and the delicious cuisine. But not everything on the Greek island is as perfect as it seems. Because as Liv slowly begins to discover, her father may not have invited her to Greece for Atlantis, but for something much more important.