Jesus appears to 7 of His disciples along the Sea of Galilee. They were instructed earlier to eventually meet Him there and are fishing.
This is the 7th of 12 post-mortem appearances of the Resurrected Jesus.
Jesus performs for them another miracle (like in Luke 5) - a net-stretching catch of fish. This most likely is an enacted parable showing that all that come to Christ is His doing, but He has chosen them to obediently do the work of catching "fish" (disciples) for Him.