The series features one woman whose family (by marriage) run a truck building business - I assume fictional called DeWitt trucks (actually Usines DeWitt in the series). After a large order for delivery trucks (~7 trucks) gets delayed and her husband and male workers get conscripted, she convinces the wives of the workers to complete the trucks. Then the order gets cancelled in dubious circumstances, so she has an idea to convert them into ambulances. One of the other “women” in the title is a prostitute, and enlists other sidelined prostitutes into becoming ambulance drivers.
strangely they seem to drive all over the place in the series (both cars and trucks) but petrol never seems to be a problem, nor do you ever see them filling up petrol etc.