A retiree battles to obtain his rightfully due pension.

Serge Pilardosse has just turned 60. He has worked since the age of 16, never unemployed, never sick. But the hour of retirement has come, and it is disillusionment: he is missing points, some employers having forgotten to declare it! Pushed by Catherine, his wife, he gets on his old motorcycle from the 70s, a "Mammut" which earned him his nickname, and sets off in search of his pay slips. During his journey, he rediscovers his past and his quest for administrative documents soon becomes incidental...