They turned back and ran along the concrete path toward Goldfish Point, then up onto the green lawn and past the palm trees of the park to the Valencia Hotel. As she looked out beyond the park’s vast lawn to the ocean, she thought about what an incredible place this was. La Jolla meant “the Jewel,” and it was the right name. She and Sam had chosen to build their house up above Goldfish Point, at the north end of the little district. The point was the entrance to the surf-splashed caves along the rocky part of the coast and was named for the bright orange Garibaldi that swam in La Jolla Cove.

When Remi and Sam had designed their house, they had just spent six years devoting all their time to building and running their company, which produced and sold the argon laser scanner that he had invented. They had been offered an astonishing sum for the company and its patents and had made the sale. For the first time not only could they afford to build a large and expensive house, they had the time and energy to devote to it.

When it was finished, the house was twelve thousand square feet on four floors planted above Goldfish Point. The top floor held Sam and Remi’s master suite, two bathrooms, two walk-in closets, a small kitchen, and a sitting room with a wall of windows that looked out on the ocean. The third floor held four guest suites, the main living room, the main kitchen, and the dining room. They had decided to use the second floor for a gym, an endless lap pool, a climbing wall, and a thousand-square-foot strip for Remi’s fencing and Sam’s judo.

The only place for an office was the ground floor. It had open work spaces for Sam, Remi, Selma, and up to four researchers. There were more guest bedrooms, a lab, and a fourteen-foot-long saltwater aquarium with plants and animals from the California coast.

As Remi and Zoltán took their evening jog home, she looked out beyond the cove and saw two yachts she had not noticed there earlier. They sat offshore about a half mile and, from her perspective on the path above the beach, they looked as though they were almost touching. They were both big, fast cruisers in the 130-foot class, a kind of yacht that she had seen European celebrities charter in the western Mediterranean. They were commonly capable of about sixty knots, and a few were faster. She’d seen a few like them in the San Diego Harbor in the past couple years, but they were extremely expensive and better suited for speeding people between the Greek islands or along the French Riviera than plying the Pacific.