Tenacity

Suicide is always investigated.

Especially when a Royal Navy submarine officer kills himself on board, only days after his wife's brutal murder.

Now Lieutenant Danielle Lewis, the Navy's finest Special Branch investigator, is two hundred metres below the surface.

Interrogating the tight-knit all-male crew of HMS Tenacity. Trying to determine if there's a link.

In the face of extreme hostility, justice must be served and only the most tenacious will survive.

For Dan pressure is inside. Outside. Everywhere...