After months working on an oil rig in the Atlantic Ocean, engineer Jo Blaine can't wait to get home. Her job is tough, and she is desperate for some long overdue girl time. The last thing Jo needs when she walks through her front door is to find a strange man staying in her house. When she learns that her uninvited guest is none other than Stephen Hardy, she's tempted to head straight back out to sea.

Stephen has always felt guilty for the part he played in ruining Jo's life years earlier and immediately jumps at the chance to make things up to her by looking after her apartment and her giant cranky cat. It takes some fast talking, but Jo is finally convinced to let him stay. And by the time she leaves for her next shift at work, they're both eagerly anticipating her return.

But as they grow closer, it soon becomes clear Jo is hiding something about her past that is coming back to haunt her. After a lifetime of taking care of herself and her sister Amy, Jo isn't used to sharing her problems, especially when they involve her messy family history. But when threats start to escalate, Jo must decide whether to trust Stephen before her stubborn independence places them all at risk.