When Marissa loses her mother at the age of six, her father, a marine biologist, decides to continue his wife's research. Father and daughter travel to Thailand. There she meets Ariel, and a truly magical friendship blossoms. During the week, the girls live at Ariel's parents' resort; on weekends, they spend time with Marissa's father on a nearby island. Together, the girls discover the fragile wonders of the reefs, forests, and beaches. Together, they learn to dive to the depths and hold their breath for minutes at a time. They move through the water as effortlessly as the manta rays they know by name. Together, they learn to swim out of danger. But then a giant wave comes, one that Ariel cannot escape. Years later, Marissa is back in New York, disoriented and haunted by the memory of her friend, once again threatened by a natural disaster. As the past returns over the course of two fateful days, she discovers how to survive in an uncertain world. New product