It takes a few days before Julia lets go of the wary look and leaves Holly and Selena alone together. But one afternoon they’re at the Court and Julia needs to get her dad a birthday card, and Becca remembers she owes her gran a thank-you card; and Selena holds up her bag from the art shop and starts drifting towards the fountain, and by the time Holly heads after her it’s too late for Julia to change anything.

Selena arranges perfect tubes of paint in a fan on the black marble and strokes the colour bands with a fingertip. Across the fountain a gang of guys from Colm’s turn to eye her and Holly, but they won’t come over. They can tell.

‘Lenie,’ Holly says, and waits the long stretch till Selena thinks of looking up. ‘You know one thing that might make you better?’

Selena watches her like she’s made of cloud-patterns, shifting gracefully and meaninglessly across a wide sky. She says, ‘Huh?’

‘If you found out what happened,’ Holly says. Coming this close to it makes her heart skid fast and light, no traction. ‘Last year. And if someone got arrested for it. That would help. Right? Do you think?’

‘Shh,’ Lenie says. She reaches over and takes Holly’s hand – hers is cold and soft, and no matter how tight Holly squeezes, it doesn’t feel solid. She lets Holly hang on to it and goes back to her paints.

Holly learned from her dad a long time back that the difference between caught and not is taking your time. She buys the book first, in a big second-hand bookshop in town on a busy Saturday; in a couple of months’ time Mum won’t remember I have to get this book for school can I have ten euros I’ll only be a sec, no one at the till will remember some blond kid with a musty mythology book and a glossy art thing to wave at Mum. She finds a phone pic that has Chris in the background and prints it off a few weeks later, on a lunchtime dash for the computer room; in no time the others will have forgotten her taking a few minutes too long to get back from the toilet. She slices and glues on her bedroom floor that weekend, wearing gloves she stole from the chem lab, with the duvet ready to yank over the whole thing if Mum or Dad knocks; after long enough they’ll forget any comforting playschool whiff of paper glue. She dumps the book in a bin in the park near home; within a week or two it’ll be well gone. Then she slides the card down a slit in the lining of her winter coat, and waits for enough time to move past.