CO CDR Tom Chandler and his crew find themselves in a whole new world when the ship's scientist passenger, Dr. Rachel Scott, reveals that the entire planet is in their hands.
With Rachel close to a breakthrough on her vaccine, she, Chandler and XO Slattery lead a small team into the jungles of Nicaragua on a mission to find monkeys for her vaccine trials.
With monkeys for testing, they work towards a vaccine but with no cure in sight, a serious lack of monkeys and increasingly depressing distress calls, they think about returning to Nicaragua.
After picking up a distress call near Jamaica, Chandler and a small team stage a rescue attempt. But a surprise attack leaves Chandler and Tex stranded at sea.
With a potential cure in their grasp, Dr. Scott asks for human volunteer's to test her formula that was successful on a monkey. However, will this be the answer she is looking for, or will it put the volunteers' lives in jeopardy?