Hans and Anna's long-standing routine symbiosis makes friends, notably regular dinner-mates Florian and Lisa, nickname them The Hannas. When Hans and Anna happen to meet sisters Nicola, a masseuse, and Kim a hardcore gym trainer, their relationship is threatened by the ensuing affairs. Not wanting to separate but bitterly jealous when each realizes the other is also cheating, they seek therapy.
—KGF Vissers