While the other team members launch an investigation into the Gate, Andi experiments on a captive orb. Because aftereffects from the green fungus make it difficult for her to focus, she visits a highly-recommended psychiatrist, Dr. Hamish Drummond. Just when Andi achieves a breakthrough, Dr. Drummond’s life is threatened . . . and the Harbingers team realizes that their investigation has led them into perilous waters.