When your boss is at a conference in a city where there's a suspicious death, it's unlucky.

If it happens twice, it's odd.

But when she's in the same city at the same time as a third unexplained death . . .

Could she be a stone-cold killer?

Millie's always known her boss Freya is a psycho – the demanding and ever-changing coffee orders, the cryptic instructions, the apparently expected mind reading and don't even start on the insistence that Millie wears heels . . . All. The. Time.

But it only extends as far as exacting office standards. Right?

As Freya's assistant, Millie has privileged access to her diary and travel history and when a pattern emerges of men (who seem to have no connection to each other) dying in cities where Freya is travelling, Millie is determined to figure out what's going on.

After all, a stone-cold killer could be exactly what Millie needs . . .