Homeward Bound is a story mission in the video game, "South Park: The Fractured But Whole".
Plot details follow.
Go home, eat dinner, and go to bed.
Once you're ready, head home. You'll have to change out of your costume into your normal clothes. Your parents will be fighting, and will leave you alone to eat dinner.
After eating dinner, head upstairs. Make sure to check your toy chest for rewards from leveling up your Hero Rank or Side Quests.
Now, go to sleep to make it transition into night time, and head out on your next mission: The Bowels of the Beast.