According to Plan

Silvia and her three adult daughters Iris, Anne and Marianne: three fundamentally different personalities rub shoulders in a web of relationships that could not be more complicated. Iris (Corinna Harfouch), the eldest of the sisters, has not left the house of her childhood and self-sacrificingly cares for her alcoholic and emotionally unstable mother. The two share a love-hate relationship, and in the small shared apartment, hurtful words alternate with concerned tenderness. The middle sister Anne (Dagmar Manzel) has nothing of Iris' pedantic and serious nature. She is considered the freakiest of the women and has long since run away from home. On the occasion of her mother's birthday, she returns home to rough up her relatives a bit. The fact that she is overjoyed to be received by Silvia (Christine Schorn) as the prodigal daughter quickly dampens Iris' joy at the reunion. After all, she has had to bear all the burdens alone for years. The potential for conflict at the small family reunion is further heightened when Silvia's ex-husband arrives too early for the birthday festivities with his much younger girlfriend. Moreover, when Anne falls in love with Marianne's (Kirsten Block) husband and betrays her sister, disaster is inevitable. What was planned as a happy birthday party becomes a test of endurance for the sisters. Silvia, meanwhile, incidentally stages the end of the world on the stage of the village theater, adding the rounding absurd-comic touch to the proceedings.