
LewisreturnstoOxfordafterseveralyearsabsenceandisreluctantlyassignedbyhisnewboss,DCSInnocent,tothemurderofanOxfordmathematicsstudentwhowasshotwhileparticipatinginasleepstudy.Thekey-codeusedtoaccessthesleeplabwasassignedtoafellowmathsstudent,DanielGriffin,butDaniel'smathtutorhasprovidedhimwithanalibi...