One Night. No Alibis

Chapter six: What Sienna Knew

Detective Rowan had been measured in his response to the phone, which Ava had expected. He thanked her, asked her a series of questions about where it had been found and who had handled it, and wrote everything down without changing his expression. He did not tell her what he thought, which also she had expected.

What she had not expected was the call that came from Riley two hours later.

'Sienna's mom asked if I wanted to take something,' Riley said. 'A book she'd borrowed and never returned. I went over to get it and she asked me to come in, and we talked for a while, and she was being so kind and so wrecked at the same time, and I offered to help her sort through some things, you know, just to give her something to do, someone to be with.' A pause. 'Ava. I found things.'

They went together, Ava and Riley, back to the Cross house on Friday afternoon. Sienna's mother was gentle and exhausted and seemed to find comfort in the distraction of company. She left them in Sienna's room with tea and a soft instruction to take their time.

The room was Sienna's, unmistakably: ordered and curated, every surface arranged with the precision of someone who understood aesthetics as a form of control. Photos on the corkboard, all carefully selected. Shelves organized by color. A vanity with products in a specific sequence.

The journal was inside the false bottom of the desk drawer, a thin panel that lifted when you pressed the right corner. Riley had found it by accident, pressing the corner while looking for a pen. She hadn't told Sienna's mother.

It was a slim black journal, no label on the cover. Ava opened it with the sense of crossing something, some line you couldn't uncross. The handwriting was Sienna's, precise and slanted, and it began about eight months earlier.

The first entries were ordinary. Observations about school, about her parents, about a trip she'd taken. Ava skimmed through these, looking for the places where the tone shifted. She found them about forty pages in.

There were pages dedicated to each of them. Not narratives exactly, more like case files. Logan's page documented things Sienna had observed: a conversation she'd overheard, a discrepancy between something he'd said publicly and something she'd seen privately. The notes were specific and carefully dated. Riley's page was more personal, more conflicted in tone, as if Sienna had mixed feelings about what she was recording. Zach's page was the longest, dense with observations that suggested Sienna had been paying close attention to him for months.

And Caleb's page.

Caleb's page was shorter than the others but the last entry, written two weeks before the party, was underlined twice. It read: He thinks I don't know. I know.

'What does that mean?' Riley whispered.

'It means she knew something specific,' Ava said. 'Something he thought was secret.'

There were also photographs. Not printed photos, but a small envelope of them, physical prints, which felt deliberate in an age when everything was digital. Photos of each of them in moments they probably wouldn't have chosen to be photographed: an argument caught from across a parking lot, a meeting at a place that didn't make obvious sense, an expression on someone's face in a context that was unclear but uncomfortable.

Sienna had been watching all of them. For months, carefully and systematically, she had been assembling something. Not just observations. Evidence.

Ava sat on the edge of Sienna's bed and held the journal and felt the shape of the thing rearranging itself in her mind. The question had been who threatened Sienna. But the better question, the deeper one, was what Sienna had done to deserve threatening.

Or rather: what Sienna had done that someone had been desperate enough to stop.