Shortly before Christmas, the situation at the restaurant “Vier Meerjungfrauen” on the Baltic Sea is very tense: the lease expires and is not to be renewed. Owner Maren seems to be facing the ruins of her existence. Her three daughters also carry their male problems and worries into the house. Will the “Four Mermaids” nevertheless succeed in celebrating a merry Christmas together? Third part and conclusion of the “Four Mermaids” trilogy.