CHAPTER ONE

      Ten years ago...

      THE PARTY HAD got off to a slow start, but by eleven o’clock the house was packed with people and Leo Cross was beginning to feel hot and uncomfortable in his costume.

      It had seemed like a good idea at the time. Orion Shift was less of a TV show to the six medical students who shared the sprawling house in West London and more of a Friday evening ritual. The one hour in the week that didn’t belong to study, girlfriends or the urgent need for sleep. So what better way to celebrate their third year exam results than decorate the living room with as much tinfoil as they could get their hands on and suspend inflatable planets from the ceiling?

      Dressing up as the crew of the interstellar spacecraft Orion Shift had been the next logical step. But a hot summer’s evening wasn’t really the time to be wearing a heavy jacket with a high collar, and Leo was beginning to wish that personal temperature regulation fields really had been invented.

      A girl in blue body paint and a leotard sidled up to him. ‘Captain Boone! You look particularly delicious tonight.’

      ‘Maddie. How are you doing?’

      ‘You want a Tellurian cocktail?’ Maddie draped her arms around Leo’s shoulders. Clearly she and Pete had been arguing again. It was only a matter of time before the inevitable reconciliation, but at the moment Pete was on the other side of the room taking a great deal of interest in a red-haired girl dressed as a Fractalian hydra and Maddie had clearly decided that she was going to give him a taste of his own medicine.

      Leo disentangled himself from Maddie’s grip. ‘No. Thanks, but...’ Just no. If Pete and Maddie wanted to play games that was fine, but Leo knew better than to get involved.

      ‘Leo...!’ Maddie stuck out her lower lip in a disappointed pout as he retreated quickly through the press of people.

      He pushed his way to the kitchen, avoiding the usual group around the beer keg, and slipped outside into the back garden, sighing with relief as the warm breeze brushed his face. The paved space at the back of the house was packed with people, drinking and talking, and Leo made good his escape, dodging across the grass and into the pool of darkness that lay beneath the trees at the end of the garden.

      He bumped into something soft and sweet-smelling and saw a flash of silvery-green luminescence. A shadow detached itself from the other shadows and stumbled into a pool of moonlight. It was Lieutenant Tara Xhu to a T.

      ‘Another fugitive?’ A smile played around her lips.

      ‘You could say that. So how did you manage to make it out of there?’

      Tara—or whatever her real name was—shrugged. ‘I’m not sure. I’ve only watched one episode, and that was to get the costume right, so I don’t really know what Tara’s strategy might be.’ Her mouth twitched suddenly into a flirtatious smile. ‘So you’re Captain Boone?’

      Leo’s eyes were beginning to adjust to the darkness and the more they did so, the more he liked what he saw. She was dressed all in black, thick leggings, boots and an off the shoulder top that followed her slim curves and displayed the green scales which spread across Tara’s shoulder. A fair replica of an immobility gun was strapped to her thigh and twisted metallic strands ran round her fingers and across the back of her hands. Her dark hair was streaked with green and anchored in a spiky arrangement on the top of her head with Tara’s silver dagger pins.

      Leo had been in love at first sight before, but suddenly the other times didn’t seem anything like the real thing. She raised one jewelled eyebrow and Leo realised that his gaze had been following the path of the scales that ran down the side of her face and neck and disappeared beneath her top.

      ‘Um... Great costume. Your scales look...really lifelike.’ Captain Thomas Boone would undoubtedly have managed something a bit more urbane, but then he had more experience of the galaxy than Leo.

      ‘Thanks. Iridescent body paint. I felt a bit of an idiot on the bus, on my way here.’ She grinned at him and moved back towards the old picnic bench which stood under the trees. ‘So are you really escaping something, or do you just want some fresh air?’

      ‘A bit of both.’ Leo sat down next to her, stretching his legs out in front of him. This replica Tara had a lightness about her movements, a kind of joy about her, which broke through the warlike quality of the real Tara’s appearance. Even though she was sitting a good two feet away from him, Leo could almost feel her warmth.

      ‘You live here?’

      ‘Yes.’

      ‘Then you must be a medical student.’

      ‘That’s right. Starting year four in a couple of weeks, so this’ll probably be the last party we have for a while.’

      ‘I hear it’s a tough year. An interesting one, though...’

      That was exactly how Leo felt about it. He knew that his clinical attachment was going to be hard work, but he couldn’t wait to start putting all that he’d learned into practice. ‘What do you do?’

      She shrugged. ‘Nothing at the moment. I’m just back from a year in Australia.’

      ‘Yeah? What’s it like?’ All Leo wanted to do right now was sit here in the darkness and listen to her talk.

      She laughed. ‘Bit too big to describe in one sentence. I loved it, though.’

      Leo imagined that she’d taken every moment of the last year and squeezed the very most out of it, in the same way that she seemed to be draining every drop of potential from these moments. It was infectious.

      She was fiddling thoughtfully with the bright silver strands across the back of her hand. ‘Did you always want to do medicine?’

      ‘Yeah. My uncle’s a doctor, and when I was nine I saw him save someone’s life. That settled it for me, and there’s never been anything else I wanted to do.’

      She nodded quietly. ‘So you have a calling. A mission in life.’

      Sometimes, poring over his books late at night, it didn’t seem so. But Tara made it all sound like something special.

      ‘Yeah. Guess I do.’

      ‘I’m