AU where Danny never tells Sam and Tucker about the portal accident but they eventually put together the pieces after Danny starts acting hella weird. Especially around his parents.
They eventually figure it out but can't seem to decide whether their friend is actually dead or if there's something else going on. They inadvertently become ghost experts while playing detective, while also simultaneously trying their best to help Danny from the shadows without him finding out that they found out.
Bonus points if they have to fend off Jazz with a stick cause she knows something's up and she knows that Sam and Tucker know but Sam and Tucker keep covering their tracks and doing their best to throw her off the scent.
Bonus, bonus points if Jazz knows that there's something very messed up going on and desperately wants to know what happened to her brother but Sam and Tucker think she's on her parent's side and are convinced that she'll just report back to them if she ever finds out.
Bonus, bonus, bonus points! if Jazz just has this deep, gut-wrenching feeling that she can't tell her parents about her suspicions and that there's something increasingly disturbing about both her parents and Danny's behaviour as well as how the three of them interact after the portal got turned on. She does her best to keep her parent's attention off of Danny, which kinda helps but also inadvertently gets in the way of Sam and Tucker's helping.
Bonus, bonus, bonus, bonus points!!!!! if Maddie and Jack have acquired some very mild ecto contamination from being in such close proximity with the portal on a daily basis and their continued exposure is making them slowly exhibit Obsession-like behaviours about their work and research, which consequentially results in their attitudes/behaviours becoming increasingly more disturbing and concerning from an outside perspective.













