When two tween boys Nate and Tyler are pushed together by their parents developing relationship, they struggle to find anything in common as they are forced into a blended family. Nate's father Ben loses his job and they all move in together. The newly formed family must figure things out fast. Nate and Tyler are exploring the beach area and meet Travis and Sarah. One night Travis and Sarah take them to their favorite secret spot, a beautiful spot in the harbor. The harbor has been closed off to the public but that doesn't keep them from enjoying the beauty of the blue waters. As they explore the harbor one night, they see something stirring in the waters, something with beautiful colors that dance off the light of their flashlights. The kids soon realize it's some sort of mystical sea creature and quickly learn that she is injured and vulnerable. They must develop a plan to get her back to the open water and reunite her with her family. During this exciting adventure they meet both friends and foes but ultimately it pulls this family together and creates memories and a bond between these cast of characters that can never be broken.