A whole group of people usually work on the investigation of serious crimes: a detective and assistants. The detective has a partner who helps him, together they interview witnesses and go to the arrest. This is for security reasons. The hero of Last Seen - Donald has solved a lot of cases with his faithful friend and partner Mark. They often saved each other's lives and helped out of difficult situations. But it's been a couple of days since Mark disappeared. He is not at home, he did not appear at the station and did not warn anyone. The last time he called from some apartment in the city center, and then disappeared. His friend went to this apartment to find out what his partner was doing there. It is necessary to thoroughly search all rooms, perhaps there is some evidence that will shed light on the disappearance of the policeman in Last Seen.