You need to read a yearly review for Y&R.
Brad drowned/froze to death while rescuing Noah after he fell in the lake while skating with Eden.
Colleen drowned in the same lake while going to get help for her kidnapper Mary Jane Benson/Patty Williams who was bit by a spider.
Lily and Cane got back together after the truth was revealed about Chloe's fake story about Cane being the baby daddy.
Cane and Lily married and not long after that she became sick with cancer.
Paul and Nikki rekindled the sparks from their youth. They were going to get married and on the eve of her wedding she called it off. She was still in love with Victor.
At the lake when Colleen drowned, Jack rescued her and Mary Jane/Patty heard him yelling. She held a gun to Jack and told him not to call for help. Then Victor intervened and shouted at Patty and she shot Victor. Victor needs a heart transplant due to the injuries.
Katherine was in a car wreck with her doppleganger, Marge Catrooke. Marge died in the wreck but she was mistaken for Katherine. Kay was rescued by her now husband, Murphy. He held her regain her memory and took care of her, they fell in love during their time together.
Sharon left Jack after she discovered more lies about the fake Victor diary and realized that Jack would always put his revenge against Victor before her. She went to the Abbott cabin to recuperate. She realized she was still in love with Nick. Nick went to the cabin to let her know that Noah was in the hospital after he fell in lake while skating. They made love and now she's pregnant.
Nick's in the hospital with Victor, Victoria and Nikki waiting for a heart transplant for Victor. He and Phyllis recently renewed their vows.
Phyllis went to Switzerland ? with Summer. Summer had some brain damage after Mary Jane/Patty deliberately kissed her after eating a peanut based cookie. Summer had a severe allergic reaction, it was touch and go for awhile but she's slowly getting better. Phyllis took Summer to a specialist that may be able to help her recover.
Neil left Newman Enterprises after once again not given the top office. He's now working as CEO for Chancellor Industries. He married Karen last December but all the while carrying a torch for Tyra. Karen left town wanting a divorce. Tyra and Neil got together but Neil decided he had to put his daughter first after she became ill. Tyra slept with Devon for comfort. Neil and Devon talked about it and still there for each other.
Lily split from Cane after she learned he lied about his true identity. After she became ill with cancer and had surgery, she need to be with him to fight it. Neil has kept his distance since Lily moved back to her and Cane's home.
Hope that helps.