A look is taken into the murder of Scott Wilkinson, who leaves his home in Walton-on-Thames and heads out for his annual fishing trip on ‘Donkey Island' in Surrey, but three days later, his body is found floating in River Thames after he is brutally beaten over the head with a blunt object.

After a student is found dead in his car, investigators suspect his girlfriend's brother to be the culprit until he's spotted on CCTV across town at the time of the murder, leaving detectives struggling to unravel a sordid, and lethal, family plot.