It's Christmas Eve: a time for curling up by the fire with family and friends; a day when even the most voracious corporate climbers generally head home by dinner time. But not Angela. She's the last one left at the office, determined to close one more deal before the holiday. The long hours she keeps will have an impact, but not the kind she's been hoping for.

When she gets down to the parking garage, she discovers her car won't start. The timing couldn't be worse; she's already late for Christmas Eve dinner with her family, the garage is deserted and her cell phone doesn't get a signal underground. But then a friendly security guard comes along and offers to help. He flirtatiously invites her to stay and share a small Christmas dinner he's preparing in the parking office, but she laughs it off. Before she knows what's hit her, she's been knocked unconscious. When she wakes up, she's tied to a chair in the security guard's office. As it turns out, his dinner invitation was not optional – and it's going to involve a lot more than a meal. If Angela wants to live to see Christmas morning, she must find a way to escape from level P2 of the parking garage.