Conor is invited to meet with the Maclir clan on a remote island to discuss unifying forces against the Romans. They've been lured into a trap as the Maclirs have already allied themselves with the Romans. Megan, their leader, has struck a bargain with Longinus and Diana to buy copies of the hundreds of booby traps spread around their island. But first, she must prove they work by killing Conor and his friends.
- Conor and his friends travel to an island to negotiate an alliance but find themselves part of a military demonstration project by the islanders hoping to make a living by selling traps to the Romans. A local who has gone into hiding offers them a solution.