Rainer og Alice har været gift længe. Traditionen tro inviteres der til fastelavnsfest igen i år. Nu skal der festes og slås katten af tønden. Der drikkes, hæmningerne smides og maskerne falder; en hemmelighed afsløres og det bliver en aften som de aldrig vil glemme.
´Black Heart’ er en film om mentale efterveer. Den følger tre new yorkere, som hver især bestræber sig på at behandle et personligt tab. Den fjerde karakter er New York, som forsøger at komme sig efter 9/11-tragedien og det sår, som stadig eksisterer.
Nadim er en minoritetsetnisk mand med tjek på tilværelsen. Han vil dog på ingen måde associeres med de mennesker, der ligner ham, men ikke kan opføre sig ordentligt. På vej til sin søsters fødselsdag sætter hans egen fordomsfuldhed ham i en position, der får dramatiske konsekvenser for ham.
Kira is a single mother struggling to build a better relationship with her distant teenage daughter, Lina. One day, Kira has a bright idea that she believes could pave the way for a stronger bond between them. In her attempt to make the idea a reality, enticing shadows of the past start catching up with her.
William is convinced it is his fault that the world is coming to an end. On the planet's last day, he is faced with a dilemma; Should he spend his last hours with his family, who have chosen to celebrate his disabled sister's birthday, or should he meet up with his crush, who is impatiently waiting for him at the local beach?
The film takes place in a near-future, where earth has punished all adults for not taking properly care of our planet. We follow a group of kids, left all by themselves in a trashed world, living day by day and trying to avoid the unknown future. The kids put all their fear into hating the adults, but what will happen when one of the kids starts to become one?