The Detectives of Sunnywood Retirement Home

A lot of time has passed since the young detectives Kribu and Krabu went on 3rd grade. By now Krabu a.k.a. Mati (91(, a retired police constable lives in a retirement home but old habits die hard as when his roommate Artur (87), ends up in a hospital with a suspicion of being poisoned, Mati doesn't think twice about it and gets right on track. Of course Piia (age unspecified but undoubtedly still quite young), jumps in to lend a helping hand.