Lewis' team must delve into the worlds of social media, drugs, taxidermy, alternative art and the homeless East European community.

When an idyllic Oxford summer's day is torn asunder by a gruesome parcel bomb, Lewis and Hathaway are called in to investigate.

With his six-month trip to New Zealand with Hobson on the horizon, Lewis is in a race against time to save his career and relationship.

Lewis and Hathaway are called in to investigate the apparent death by drug overdose of over achieving student and amateur taxidermist Talika Desai.

When College Dean Phil Beskin is found bludgeoned to death with a rock in local woodland, Lewis and Hathaway are called in to investigate.

Before the fourth murder takes place, the team must uncover the guilty secret that their victims share in order to learn the identity of both the killer and the potential victim.