A catastrophic train derailment sends the city spiraling into chaos. But the derailment is just the beginning. A biological gas attack sees crash survivors collapsing and dying within minutes. And the sickness is spreading. Rapidly

When Cecilia's abusive ex takes his own life and leaves her his fortune, she suspects his death was a hoax. As a series of coincidences turn lethal, Cecilia works to prove that she is being hunted by someone nobody can see.