Night-blooming jasmine filled the air with perfume. I backtracked to the front door and rang properly. Moments later Serena answered, dressed in slacks and a white silk shirt.

"I brought your keys back," I said, holding them out to her.

"Those are my keys? Oh, so they are," she said. "Where did these come from?"

"Lorna's mother came across them. You must have given Lorna a set when she was house-sitting for you."

"Thanks. I'd forgotten. Nice of you to return them."

"I've also got a question, if you can spare me a minute."

"Sure. Come on in. Dad's out on the patio. He just got out of the hospital today. Have you met him?"

"I don't think our paths have ever crossed," I said.

I followed her through the house and into a large country kitchen. A cook was in the process of preparing the evening meal, barely glancing up from her chopping board as we passed through. An informal dining table large enough to seat eight was located in a bay of French doors on the far side of the room. The ceiling rose a story and a half, with crisscrossing wooden beams. An assortment of baskets and bunches of dried herbs hung on wooden pegs. The floor was a pale, glossy pine. The layout of the room allowed space for two separate cooking islands about ten feet apart. One was topped with dark granite with its own inlaid hardwood cutting surfaces and a butler's sink. The second housed a full-size sink, two dishwashers, and a trash compactor. A fireplace on a raised hearth held a blazing fire.

Serena opened the French doors, and I followed her out. A wide flagstone patio ran the width of the house. Outside lights seemed to create an artificial day. A black-bottomed lap pool, a good seventy-five feet by twenty, defined its outer edge. The water was clear, but the black tile seemed to erase its inner dimensions. Pool lights picked up a shifting web of emerald green that somehow made the bottom look endlessly deep. Diving into that would be like a plunge into Loch Ness. God knew what creatures might be lurking in the abyss.

Clark Esselmann, in his robe and slippers, a stick in his hand, was teasing a black Labrador retriever into the ready position. "Okay, Max. Here we go now. Here we go."

The dog was full-grown, probably the same age in dog years as the old man himself. Max nearly quivered, totally focused on the game being played. As we approached, the old man threw the stick into the lap pool. The dog flung himself into the water, moving toward the stick, which was now bobbing in the water at the far end. I recognized Serena's father from numerous pictures that had appeared in the Santa Teresa Dispatch over the years. White-haired, in his seventies, he carried himself with an old-fashioned ramrod-straight posture. If his heart problems had affected him, it was hard to see how.

Serena smiled, watching them. "This is the first chance he's had to connect with Max. They usually go through this first thing in the morning, and what a sight they are. Dad swims in one lane and the dog swims in the other."

Vaguely I was aware of the telephone ringing somewhere inside the house. The dog collected the stick in his teeth and swam in our direction, scrambling up the stairs at the near end of the pool. He dropped it at the old man's feet and then barked once sharply. Esselmann threw the stick again. It sailed toward the deep end of the pool, landing with a faint splash. The dog flew off the side and swam, head high. The old man laughed and clapped his hands, urging the dog on. "Come on, Max. Come on."

The retriever clamped his mouth on the stick again and turned, paddling back to the stairs, where he scrambled out, water pouring off his oily coat. Max dropped the stick at Esselmann's feet and then shook himself vigorously. Water flew out in all directions. Both Serena and her father laughed. Esselmann brushed at the polka dots of water on his cotton robe. I could have sworn Max was grinning, but I might have been mistaken.

A maid in a black uniform appeared at the French door. "Mr. Esselmann? Phone for you."

The old man turned and glanced in that direction, then headed toward the house while the dog pranced sideways and barked, hoping for one more toss. Serena caught my eye and smiled. Clearly, her father's hospital discharge had lightened her mood. "Can I offer you a glass of wine?"

"I'd better not," I said. "Wine makes me sleepy, and I have work to do yet."

We moved back through the French doors into the kitchen, where the wood fire popped cheerfully. Esselmann was standing near the planning center, on the telephone. He glanced over his shoulder and raised a hand, indicating his awareness of our presence. Beyond him, the door to the hall was open, and the dog's wet footprints led to a second door that was now closed. I had to guess Max had been relegated to the basement until he managed to dry himself. I heard a scratching noise, and then the dog issued one of those brief barks intended to make his wishes known.