Ep 30. Diary

Mordecai and Rigby find a diary in the lost and found and become obsessed with reading it. They discover that the diary belongs to someone in the park and set out to find the owner. Along the way, they read more entries and become even more invested in the story.

As they search for the owner of the diary, they encounter various park employees who may or may not be connected to the diary. Each encounter gives them more clues and they become increasingly determined to solve the mystery.

Meanwhile, Benson becomes concerned about Mordecai and Rigby's sudden obsession with the diary and tries to get them to focus on their work. However, his efforts are unsuccessful and Mordecai and Rigby continue to read the diary, growing more and more engrossed in the story.

Eventually, they find the owner of the diary and return it to them, only to discover that the owner is not who they expected it to be. The owner's identity surprises them and raises even more questions, leading Mordecai and Rigby to delve even deeper into the mystery.

As they investigate further, they begin to uncover a web of lies, secrets, and betrayals that threaten to destroy the park. With the help of their friends, Mordecai and Rigby must unravel the truth and stop the potential threat before it's too late.

The episode is filled with humor, suspense, and unexpected twists and turns that keep the audience guessing until the very end. It also explores themes of obsession, trust, and the power of secrets, making it one of the standout episodes of the season.