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When Andrea, a damage regulator from Benthos Oil, is sent out to Rig 45 two days before Christmas to investigate a fatal accident, the rig is hit by a hurricane and all communications lost. Soon, the crew realize that the accident is in fact a murder, and they now know that they are in real danger.
After an accident that takes the life of a worker on an oil platform, a security researcher begins to suspect that the situation is more sinister than it seems.
Bentos employees refuse to cooperate with Emma and Trevor, which raises suspicions about employee motivation; Trevor begins to doubt Emma's ability to lead the investigation.
A murder aboard the platform confirms suspicions that someone is behind the accidents; tensions between crew members increase.
The crew does its best to reestablish communications with the outside world; the number of victims increases.
The remaining crew members are separated into two groups, and suspicions abound about who is the killer.
The hurricane begins to move away from the area, and a dangerous chasing game begins on board the platform among the crew members.
