Frustrated by the long quarrel between his family members, Max loses interest to celebrate Christmas. Now, he arouses Krampus, a demon who will punish his whole family.
Frustrasi dengan pertengkaran panjang antara anggota keluarganya, Max kehilangan minat untuk merayakan Natal. Kini, ia membangkitkan Krampus, sesosok iblis yang akan menghukum seluruh keluarganya.