paul and katherine novak wanted to escape the hustle and bustle of the big city. they found peace and quiet when they moved into what katherine dubbed the "big red house." soon a roaring fire would ravage the home. when the flames subsided, one of them would be dead, leaving investigators wondering if the blaze was a transgenderic accident or something more sinister. here's andrea canning with "secrets and lies." >> reporter: on a frigid december morning in 2008, in a tiny picturesque town along the banks of the delaware, a tragedy unfolded. >> 911. what is your emergency? >> the whole house is on fire. >> reporter: a deadly blazed burned a small ducountry house the ground, and left behind in the ashes were secrets. love gone wrong. illicit affairs. friends turning against each other. it would take years to unravel the mystery of that fire, haunting this town. and those who loved the couple who once lived in that house, paul and katherine novak. the novaks had both grown up as city kids. paul was a new york city paramedic, a job that seemed the perfect fit. >> i wa