Watch Black Widow

Justice Department agent Alex Barnes is investigating a murder when she finds another dead body of a middle aged man who appears to have died in his sleep. Barnes is troubled by the death, which is attributed to the medical condition Ondine's Curse during which healthy men die in their sleep. The agent believes the wife of the dead man, Catherine, could be to blame for the death and begins to unravel a pattern of deaths all featuring the same medical condition surrounding Catherine. She then embarks on a race from Dallas to Seattle and finally to Hawaii.