Verified answer

Ok so basically in the first episode Veronica is explaining what happened during the summer. Logan was obviously on the bridge when Felix was stabbed and because of this he became a suspect. During the trial Veronica stayed by his side and Logan was acquitted of all charges. Even still Logan was dealing with a lot, Lily being dead, his mother committing suicide, and his dad in jail for murder. He started acting up and doing stupid stuff with his as Veronica put it "toties." Veronica couldn't deal with it anymore and saying that it was hard trying to take care of him when he wasn't taking care of himself and so she dumped him. Well at the end of season 1 Veronica told Duncan that he was not her brother. Duncan always loved Veronica but ended it since he thought they were related. Hearing the news he broke up with Meg on the last day of school and started going to Java the Hut whenever Veronica was working. On Veronica's 18th birthday he gave her a fortune cookie which we later find out says "true love stories don't have endings." Veronica goes and kisses him and they get back together.

Now for the bus. For a journalism field trip the class gets to go to shark field. Dick complains it smells on the way there and the rich kids end up getting a limo to take back. Meg doesn't want to be by Veronica though and decides to take the bus. Veronica also takes the bus to smooth things over with Meg which doesn't work. The bus stops at a gas station and coming out Veronica sees Lilly. Instead she finds Weevil and the bus ends up leaving without her. Weevil gives her a ride and on the way home it shows everyone running out in the road because the bus went off the cliff. The person behind it crashing is the big mystery of the season. Hope that helped!