Set between the events of Halo 4 and Halo 5: Guardians… Halo: Nightfall tells the dramatic story of legendary man hunter and Naval Intelligence Officer Jameson Locke and his team as they are caught in a horrific biological attack while investigating terrorist activity on the distant colony world of Sedra. As they unravel a plot that draws them to an ancient, hellish artifact, they will be forced to fight for their survival, question everything and ultimately choose between their loyalty and their lives.

"Christmas Eve" is the dramatic, comedic story of six different groups of New Yorkers who get stuck inside elevators overnight on Christmas Eve. With nowhere to go and no one to interact with but each other, all of them are transformed by the events of their long night together.

A young doctor in a US hospital administers a powerful and untested cocktail of drugs to a coma victim. But instead of curing him, it triggers a powerful "out-of-body" experience and enables the patient - a depraved and dangerous loner - to inhabit other people's bodies and, through them, take revenge on the bullying medical students who were accidentally responsible for his condition. The doctor, who was herself a part of this group, is also targeted and as her colleagues are singled out and relentlessly picked off, she realises that she can trust no-one - friend or stranger - as this comatose killer moves in and out of bodies at will, getting ever closer as his murderous supernatural powers increase.