Abstract: A suite of hardened high security steel & concrete modules for protection of people, pets and valuables during a tornado, hurricane, home intrusion or other emergency. A Modular Security Suite [MSS™] is an above ground set of two or more rooms whose steel plate walls extend deep down into a building's concrete or other material foundation and are primarily anchored by the foundation's steel reinforcement rods and the weight of building's concrete foundation. After construction and interior decoration a MSS unit disappears into the home or office floorplan. A MSS unit could include a full bathroom, kitchenette or panty and a hallway module with built-in bunk beds. Its steel plate walls are filled with concrete and rerod to greatly increase its resistance to serve weather and debris. The design's hallway module and its two steel and concrete pocket doors protect its interior doorways from damage and provides two exits.