Post-war, the Ministry is having trouble reigning in conflicting functions and reintegrating silent Voldemort sympathizers back into society. Public's approval is at all time low and falling. Local conflicts are at all time high and rising. Some wizarding communities even talk of splitting away from Wizarding Britain umbrella. In a bid to redirect public energies, the Wizengamot passes the Marriage Law to 'bring unity… and replenish wizarding numbers'. Not all goes as expected, when sneaky purebloods and willful witches are involved.