Sensors are people with a special and very unique genetic mutation that allows one of their five senses to develop to that of extraordinary proportions. Along with mass resentment, these Sensors are given a partner, one that is also genetically unique and matched specifically to them, Protectors. Seth is an extremely powerful and deadly Sensor, who has been kept isolated from people for the last 4 years of his life. So what happens when he is paired with a small, soft-spoken Protector? Serena is about to give him a run for his money.