well lots of stuff happend in the episode, it all comes together in the end though. jist of it is, the episode is in reverse kinda because homer drinks a certain drink that makes him forget what he did the night or day before and he goes home but hsi family arnt there and he thinks hes been abandoned by the family because he did something, but the cant remember so he goes to prof. frink and this memory machine-thing (glovin) and he goes through all these memories and his kis get involved and umm he thinks marge is cheating on him with duff man, but he then jumps off a bridge and lands on a bouncy castle type thing and then everyone fills in the gaps for homer and it turns out they were planning a suprise party for him...i could have copy and pasted from wikipedia but i wrote it all now so dont take it away from me