Rammbock: Berlin Undead

Lovelorn Michael arrives in Berlin with the hope of reconnecting with his ex-girlfriend, Gabi, by returning her keys. However, her apartment is eerily empty, except for two plumbers fixing the heating. Just as he learns Gabi will be back shortly, chaos erupts when one plumber violently attacks his apprentice, Harper, revealing a sudden outbreak of madness. Teaming up, Michael and Harper manage to subdue the crazed plumber and barricade themselves inside. They soon discover they are not alone, as the entire apartment block is besieged by a ravenous mob of similarly deranged individuals.