When a young woman is reported missing, the SIM card from her phone leads police to a local man. They take him in for questioning, but it's not until a dog walker discovers the woman's body that the investigation ramps up. Police find some discarded beer cans near her body which are sent for forensic analysis, but will the DNA found on the cans match the man they have in custody? Also, police investigating a hit-and-run against an elderly woman find the proof they need on the biker's mobile phone.