The death of a schoolgirl brings Endeavour back to Oxford. When he refuses to accept that the main suspect is guilty, Endeavour has to uncover the truth and rescue a victim before it is too late.

As the highly-anticipated moon landing of Apollo 11 draws near, Endeavour finds himself investigating the death of a promising young astrophysicist and his girlfriend.

The murder of an Oxford librarian and a local tragedy test Endeavour and the team to their limits, as they uncover the truth behind the crime that has haunted them all.