The third book following 'Eleven Days' and 'The Known Dead' to feature Deputy Sheriff Carl Houseman. As usual, what initally looks like a small time midwinter break-in leads to something much bigger - a milliondollar siege of a floating casino on the frozen Mississippi River. But the temperature is rising and the heat is on Carl...

It's thirty below zero in the heartland of Iowa. If you go outside and throw a pan of boiling water in the air it doesn't come back down. The Mississippi River - which ironically runs through Iowa - three-quarters of a mile wide - is frozen solid (cars drive across it) and with it - the Colonel Beauregard - a floating casino. Carl Houseman comes upon Fred, a petty crook, lurking at the end of a driveway one night. There have been a few break-ins reported at the houses of the rich folk who have escaped to Florida for the winter. Fred confesses that he and his two cousins have been responsible for a few of them but now he's worried. He dropped his cousins off at this house a few days ago so they could break in and rob it and they never came out. On entering the house Carl finds the frozen bodies of the cousins. Murdered. Poor Fred is top of everyone's immediate suspect list but Carl thinks he's innocent. Then he chases another shady character - who turns out to be an FBI agent. So why are the FBI on the scene? Because there's been a tip-off that a big bank robbery is going to go down. But where? Carl's leads finally take him to the floating casino - where his friend and partner Hester Gorse is pulling security duty. Can he save her before the big thaw?