The season premiere follows the tragic double homicide of Reeda Roundy and Betty Gray who were found in Roundy's home, along with a satanic message written in blood. It said "Satan Loves You," and appeared to have been part of a carefully planned ritual. Detectives were puzzled, as neither murder had any signs of being ritualistic and both victims appeared to have died without a struggle. But as the investigation unfolded, detectives learned that nothing about the crime was as it appeared. In fact, it would take remarkable police work and insights from the families of both beloved mothers to finally piece together the stunning truth.