Without a trace / Danielle Steel.

Charlie Vincent feels trapped in his treadmill of a life. He's wealthy and successful doing a job he doesn't want to do, in a marriage to a woman where the romance died many years ago. All that interests Isabelle is his money to fund her extravagant lifestyle. The children have left home and there is nothing for him to look forward to. One Friday evening he leaves work in Paris after yet another row with his CEO, to head to their Normandy chateau where Isabelle has invited guests for the weekend. He's been working late every night, he's tired and he's not concentrating. Just an hour away from the chateau, his car veers off the road, down a cliff and into the sea. The accident should've killed him and he almost felt ready to die. However, he does escape the vehicle and he somehow finds the strength to climb to safety. The area is remote but in the growing darkness he sees a light on in a cottage in the woods.