|Jennifer Connelly||Dahlia Williams|
|John C. Reilly||Mr. Murray|
|Tim Roth||Jeff Platzer|
|Ariel Gade||Ceci Williams|
|Perla Haney-Jardine||Natasha/Young Dahlia|
|Linda Emond||Edith Levine|
Dahlia wants to move away from her ex-husband, Kyle, and take her daughter, Ceci, with her. Relocating to a dreary tower block, Dahlia and Ceci discover eerie, dark water leaking through the ceiling of their new apartment. Dahlia petitions the supervisor and the building's owner to fix the leak, yet it only gets worse. Now having nightmares about the dripping, Dahlia is driven to confront the problem herself.