Following the rescue of Winter, a dolphin with a prosthetic tail, the dedicated team at the Clearwater Marine Aquarium faces a new challenge. Winter's surrogate mother, Panama, has passed away, leaving Winter alone and unable to stay without companionship according to governmental regulations. The team must find another female dolphin quickly to meet these legal and emotional needs, prompting a high-stakes search for a suitable partner.

As the aquarium's staff, including Sawyer and Dr. Clay Haskett, work tirelessly on this critical mission, they encounter various setbacks and complications. Kidnappings affect their time and distract them from the mission. With Winter's condition deteriorating due to her loneliness and stress, the pressure mounts. The team's efforts build towards a crucial resolution that could secure Winter's future at the aquarium.