“Cass?” calls Dad. “You coming?”

I frown, then jog to catch up.

“If you keep glancing over your shoulder,” says Jacob, “you’re going to hurt your neck.”

He starts walking backward beside me. “Here, I’ll look for you.” He shoves his hands in his pockets and squints into the distance. “You still think we’re being followed?”

“I don’t know,” I say, shaking my head. “Something just feels … off. It has all day.”

“Maybe Mercury is in retrograde.”

I look at him. “What does that mean?”

“I have no idea,” admits Jacob, turning back around, “but I’ve heard people say it when things go wrong.”

I frown. “I don’t think planets have anything to do with this.”

Jacob shrugs, and we walk in silence toward our final location for the day.

The Eiffel Tower isn’t exactly subtle.

You can see it halfway across Paris, a dark lace spire against the sky. Up close, it’s massive. It looms like a giant steel beast over the city.

The park at the tower’s base is brimming with people, all sprawled in the afternoon sun, and the mood is the opposite of spooky. Yet when my parents start filming, I swear the clouds slide in and a light breeze rustles Mom’s hair and casts a shadow on Dad’s face.

They bring the atmosphere with them.

“The Eiffel Tower,” says Dad as Anton films him. “One of the most famous architectural feats and iconic tourist attractions in the world. A marker of history.”

Mom picks up, her voice smooth. “And story.” She glances over her shoulder at the tower before continuing. “Back at the start of the twentieth century, a young American fell in love with a French girl, and after courting her, he took her up the tower to propose. But when he drew out the ring, she was so surprised that she leaped back, slipped over the edge, and fell …”

I swallow, my skin humming with nervous energy. Maybe it’s just the near miss at the café, but the Eiffel Tower suddenly looks like an accident waiting to happen.

“There are a dozen stories just like that,” says Dad, sounding skeptical. “Perhaps they’re simply urban legends.”

“Or perhaps one of them is true,” counters Mom. “Visitors claim to have seen a young woman, perched on the darkened rail, still grinning like a bride.”

A small movement catches the corner of my eye.

It’s Pauline. As Mom and Dad tell the story, her hand drifts up to her collar again. As I watch, she draws something out from beneath her blouse. It’s a silver necklace, a pendant swinging from the end. My heart lurches, and I think of the mirror in my back pocket, ready to dispel any restless spirits.

But then her pendant catches the light, and I see it’s not a mirror, but an ordinary bit of jewelry, a silver disc worn smooth from use. As I watch, she rubs her thumb over it, her lips moving as she whispers something to herself.

“What is that?” I ask, and she shows me the talisman. Most of the details have been worn away, but I can just make out the lines of an eye.

“It’s an old symbol,” she says, “meant to ward off evil.”

“I thought you didn’t believe in this kind of stuff.”

“I don’t,” she answers quickly, waving her hand. “Just a bit of superstition.” I’m not sure I believe her.

“Well,” says Mom, coming over to us and clapping her hands. “Shall we go up?”

I swallow. “Up?” I echo, studying the tower.

Confession: I don’t love heights. I wouldn’t go so far as to say I’m afraid of them, but I’ll never be the girl standing on the ledge, arms spread wide, like that moment in Harry Potter when Harry rides a hippogriff for the first time (movie edition, obviously).

But I also can’t bear the thought of missing out.

It takes two elevators and several sets of stairs, but finally we step out onto the highest viewing platform in Paris. There’s a protective grate, but I hang back. Up here, the air is colder, and I wonder if I’d be able to feel a sudden change in temperature—a warning, if that’s what it was—before something goes wrong. The Eiffel Tower looks like it’s held together with a million nuts and bolts. What would happen if one of them broke? Or a sudden gust of wind forced me toward the edge?

I shake my head to clear it. I’m starting to sound as paranoid as Jacob.

“You say paranoid, I say practical,” counters Jacob.

And then, before I can protest, Mom links her arm through mine and draws me closer to the edge. As Dad rests his hand on my shoulder, I forget to be afraid. The entire city sprawls beneath me, as far as I can see, white, and gold, and green, and I know there is no photo in this world that can capture this view.

And for a moment, I forget about the ghosts that supposedly haunt this tower. For a moment, I almost forget the eerie, off-kilter feeling of being followed.

For a moment, Paris is simply magical.

“Just wait,” says Jacob cheerfully. “I’m sure something will go wrong.”

The crew hands Mom and Dad the day’s footage so they can review it, and Pauline kisses each of us twice, once on each cheek, and slips away into the late-afternoon light. Mom and Dad decide we should have a picnic in the hotel room. We stop by a street market and buy bread, cheese, sausages, and fruit. Mom hums, shopping bags swinging from her fingers. Dad has a baguette under his arm, and I snap a photo of them, smiling to myself.

By the time we get back to the hotel, it feels like we’ve walked across the whole city. We climb to the room on aching legs, and I’m the last one through.

“Cass, get the door,” says Mom, her arms full of food.

I nudge the door shut with my foot and tug the camera strap over my head, retreating to the little bedroom. Jacob and I flop down on my bed.

What a strange day, I think.

“Even stranger than usual,” admits Jacob.

I roll over with a groan, and I’m just reaching for one of the comics in my bag when Mom’s voice cuts through the suite.

“Cassidy!”

Jacob sits up. “That doesn’t sound good.”

My mom has a lot of voices. There’s the I’m proud of you voice. The You’re late for dinner voice. The I need to talk to you about this life-changing decision your father and I have made voice. And then there’s the You are in so much trouble voice.

That’s the one Mom’s using.

I head into the main room and find her standing, arms crossed, by the hotel room door. It’s open.

“What did I ask you to do?” she snaps, and I look from her to the door in confusion.

“I closed it!” I say, glancing toward Jacob, who only shrugs.

“Don’t look at me,” he says. “I didn’t open it.”

And I don’t really understand the big deal until I hear Dad out in the hall, calling “Here, kitty, kitty” and rattling Grim’s food dish.

Uh-oh.

“He got out?” I cry.

Here’s the thing: Grim isn’t a normal cat. He’s not a hunter, and not even all that fast. Back home, he moved around about as much as a loaf of bread. So even if I did leave the door open, which I know I didn’t, the chances of him going anywhere are slim to none.