"What's that got to do with this case?" I asked.

Frank shrugged, stubbed out his cigarette. "Just curious. The Cassie Maddox I knew wouldn't have been happy on some nice safe nine-to-five she could do in her sleep. That's all."

Suddenly and fiercely, I wanted Frank out of my flat. He made it feel too small, crowded and dangerous. "Yeah, well," I said, picking up the wineglasses and taking them over to the sink. "Long time no see."

"Cassie," Frank said behind me, in his gentlest voice. "What happened to you?"

"I found Jesus Christ as my Personal Savior," I said, slamming the glasses into the sink, "and he doesn't approve of fucking with people's heads. I got a brain transplant, I got mad cow disease, I got stabbed and I got older and I got sense, you can call it whatever you like, I don't know what happened, Frank. All I know is I want some bloody peace and quiet in my life for a change, and this fucked-up case and this fucked-up idea of yours are unlikely to give me it. OK?"

"Hey, fair enough," Frank said, in an equable voice that made me feel like an idiot. "It's your call. But if I promise not to go on about the case, can I get another glass of wine?"

My hands were shaking. I turned on the tap hard and didn't answer.

"We can catch up. Like you said, long time no see. We'll bitch about the weather, I'll show you photos of my kid and you can tell me all about your new fella. What happened to Whatsisname who you were seeing before, the barrister? I always thought he was a little square for you."

Undercover happened to Aidan. He dumped me when I kept breaking appointments, wouldn't tell him why and wouldn't tell him what I did all day. He said I cared more about the job than about him. I rinsed out the glasses and shoved them onto the draining rack.

"Unless you need time on your own, to think this over," Frank added, solicitously. "I can understand that. It's a big decision."

I couldn't help it: after a second, I laughed. Frank can be a little bollocks when he feels like it. If I threw him out now, it would be as good as saying I was considering his wacko idea. "OK," I said. "Fine. Have all the wine you want. But if you mention this case once more, I'm going to give you a dead arm. Fair enough?"

"Beautiful," Frank said happily. "Usually I have to pay for that kind of thing."

"For you, I'll do freebies any time." I threw the glasses back to him, one by one. He dried them on his shirt and reached for the wine bottle.

"So," he said. "What's our Sammy like in the scratcher?"

We finished off the first bottle and got started on the second. Frank gave me the Undercover gossip, the stuff that other squads never hear. I knew exactly what he was doing, but it still felt good, hearing the names again, the jargon, the dangerous in-jokes and the fast, truncated professional rhythms. We played do-you-remember: the time I was at a party and Frank needed to get me some piece of info, so he sent another agent to play the rejected suitor and do a Stanley Kowalski under the window ("Lexiiiiiie!" ) until I came out; the time we were having an update session on a bench in Merrion Square and I saw someone from college heading our way, so I called Frank an old pervert at the top of my lungs and flounced off. I realized that, whether I wanted to or not, I was enjoying having Frank there. I used to have people over all the time--friends, my old partner, sprawled on the sofa and staying up too late, music in the background and everyone a little tipsy--but it had been a long time since anyone but Sam had been to my flat, a longer time since I had laughed like this, and it felt good.