Kurt and Samantha are leaving the base for better jobs. The crew meet Dany, the new medic, and Tom, the new young navigator. Anne returns from holiday and meets the new diver Ronald (arrived when Anne was on holiday). Nobody suspects what is going to happen that day.

Jean Louis Hubert has been promoted to lieutenant-colonel. But when he hears that the person he submitted for becoming the new C.O. has been rejected, his mood drops below zero. But the events of the day involving his "papa" turn everything around...

A young maritime pilot just became a dad and is in 7th heaven. Several hours later Koksijde receives a emergency call... Now that Peter is the new C.O. rules get a bit stricter.