In a world gone to hell, Elle Milton - once the darling of the Sydney social scene - has carved a role for herself as the communications officer for the toughest commando team fighting for humanity's survival - Hell Squad. It's her chance to make a difference and make up for horrible past mistakes, despite the fact that its battle-hardened commander never wanted her on his team.

Commander Kaira Chand of the Australian Air Force knows the meaning of loss. She lost both her beloved husband and her father over recent years, and she vows never to let a man close again. As head of security for a secret weapons facility in the Australian desert, she’s fighting to protect the scientists working to defend Earth from invasion. That includes working with their allies, the Eon Warriors. What she never expected in her wildest dreams was to find herself instantly mated to a handsome, silver fox alien warrior.

Museum curator Haven McKinney has sworn off men. All of them. Totally. She’s recently escaped a bad ex and started a new life for herself in San Francisco. She loves her job at the Hutton Museum, likes her new boss, and has made best friends with his feisty sister. Haven’s also desperately trying not to notice their brother: hotshot investigator Rhys Norcross. And she’s really trying not to notice his muscular body, sexy tattoos, and charming smile.

Sub-Captain Eve Traynor knows a suicide mission when she sees one. With deadly insectoid aliens threatening to invade Earth, the planet's only chance of survival is to get the attention of the fierce Eon Warriors. But the Eon want nothing to do with Earth, and Eve wants nothing to do with abducting War Commander Davion Thann-Eon off his warship. But when Earth's Space Corps threaten her sisters, Eve will do anything to keep them safe, even if it means she might not make it back.

Raised from birth to be a soldier, Kace Tameron is a disciplined, military-trained gladiator. He is on contract to the Kor Magna Arena to hone his fighting skills on the blood-soaked arena sand and then return to the military. He lives for one thing: To protect his planet, and on his world, love is forbidden. But then he collides with a feisty redhead from Earth who threatens to shatter his legendary control.