The call

Adam Murray and Jonah Marshall are on the run, but at the same time are working as BPS aka Bythrone Paranormal Society. One day they get a phone call by a lady who is complaining about her cat Johnny's meowing even tho he died years ago. They go check it out but everything turns upside down.

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PS: the story goes deferent in the end, Jonah goes to save Adam instead of leaving him.

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Credits:

Story idea: @wendy_or_smth
Mandela Catalogue and Adam and Jonah's creator: Alex Kister (YouTube)