diff --git a/modules/mesh-recovery/internal/recovery/fakes_test.go b/modules/mesh-recovery/internal/recovery/fakes_test.go
index a38f086f8..48796d2cb 100644
--- a/modules/mesh-recovery/internal/recovery/fakes_test.go
+++ b/modules/mesh-recovery/internal/recovery/fakes_test.go
@@ -122,6 +122,8 @@ func (s *fakeSeats) Streams(context.Context, string, string, string) ([]string,
 	return s.streams, nil
 }
 
+func (s *fakeSeats) RunningFingerprint(context.Context, string) (string, error) { return "fp-run", nil }
+
 func (s *fakeSeats) Backup(context.Context, string) (string, error) {
 	if s.backup == "" {
 		return "", errors.New("no repository snapshot holds it")
diff --git a/modules/mesh-recovery/internal/recovery/points.go b/modules/mesh-recovery/internal/recovery/points.go
index 9256efd47..18e5ec14c 100644
--- a/modules/mesh-recovery/internal/recovery/points.go
+++ b/modules/mesh-recovery/internal/recovery/points.go
@@ -28,6 +28,8 @@ func (e *Engine) run(ctx context.Context, a *Act) {
 		e.expire(a.ID)
 	case KindRestore:
 		err = e.restore(ctx, a)
+	case KindAside:
+		err = e.aside(ctx, a)
 	case KindRestoreAside:
 		err = e.restoreAside(ctx, a)
 	case KindDiscardAside:
diff --git a/modules/mesh-recovery/internal/recovery/recovery.go b/modules/mesh-recovery/internal/recovery/recovery.go
index bdd0d05d8..91c1ab8f7 100644
--- a/modules/mesh-recovery/internal/recovery/recovery.go
+++ b/modules/mesh-recovery/internal/recovery/recovery.go
@@ -76,6 +76,8 @@ type Seats interface {
 	HandAct(caller, asker, what, why string) error
 	// Streams are the bus names of a module's kept data at a fingerprint, from its catalog graph entry (§554 Bus names).
 	Streams(ctx context.Context, module, kept, fingerprint string) ([]string, error)
+	// RunningFingerprint is the fingerprint the node-engine's placement runs for the module (A-123).
+	RunningFingerprint(ctx context.Context, module string) (string, error)
 	// Backup brings the points directory of the module's item back beside its path through the backup holder and
 	// answers where (§516); an error when no repository snapshot holds it.
 	Backup(ctx context.Context, module string) (dir string, err error)
diff --git a/modules/mesh-recovery/internal/recovery/restore.go b/modules/mesh-recovery/internal/recovery/restore.go
index cfec63109..744a2eaf6 100644
--- a/modules/mesh-recovery/internal/recovery/restore.go
+++ b/modules/mesh-recovery/internal/recovery/restore.go
@@ -35,7 +35,7 @@ type asideRecord struct {
 }
 
 func (r asideRecord) aside() seat.Aside {
-	return seat.Aside{ID: r.ID, Name: strings.Join(r.Streams, ","), Size: r.Size}
+	return seat.Aside{ID: r.ID, Names: r.Streams, Size: r.Size}
 }
 
 func (e *Engine) asideRoot(module, kept string) (string, error) {
@@ -279,6 +279,29 @@ func (e *Engine) readAside(module, kept, id string) (*asideRecord, error) {
 	return &rec, nil
 }
 
+// aside is the hand verb `aside` (§516, §554, A-123): it sets the live kept data aside without restoring it, taking the bus
+// names from the catalog entry of the fingerprint the node-engine's placement runs for the module, and removes the live
+// objects once the aside is whole and checked (a move, not a removal: the data stays in the aside until it is discarded or
+// put back by `restore-aside`); it ends with `set-aside`.
+func (e *Engine) aside(ctx context.Context, a *Act) error {
+	fp, err := e.Seats.RunningFingerprint(ctx, a.Module)
+	if err != nil {
+		return err
+	}
+	a.Fingerprint = fp
+	names, err := e.Seats.Streams(ctx, a.Module, a.Kept, fp)
+	if err != nil {
+		return err
+	}
+	rec, err := e.setAside(ctx, a, names, true)
+	if err != nil {
+		return err
+	}
+	x := rec.aside()
+	e.say(seat.EventSetAside, seat.SetAsideEvent{Act: a.ID, At: e.now(), ID: x.ID, Names: x.Names, Size: x.Size}, a.Module, a.Kept)
+	return nil
+}
+
 // restoreAside is `restore-aside` (§566): it puts an aside whose record ends at `removed` back under the live names it
 // was taken from, refusing while a live object of those names exists, and ends with `restored`.
 func (e *Engine) restoreAside(ctx context.Context, a *Act) error {
@@ -312,7 +335,7 @@ func (e *Engine) discardAside(a *Act) error {
 		return err
 	}
 	x := rec.aside()
-	e.say(seat.EventAsideDiscarded, seat.AsideDiscardedEvent{Act: a.ID, At: e.now(), ID: x.ID, Name: x.Name, Size: x.Size}, a.Module, a.Kept)
+	e.say(seat.EventAsideDiscarded, seat.AsideDiscardedEvent{Act: a.ID, At: e.now(), ID: x.ID, Names: x.Names, Size: x.Size}, a.Module, a.Kept)
 	return nil
 }
 
diff --git a/modules/mesh-recovery/internal/recovery/restore_test.go b/modules/mesh-recovery/internal/recovery/restore_test.go
index 1945a1823..2242705b1 100644
--- a/modules/mesh-recovery/internal/recovery/restore_test.go
+++ b/modules/mesh-recovery/internal/recovery/restore_test.go
@@ -232,3 +232,26 @@ func TestRestoreAsideRefusesLiveNamesAndDiscardAsideRemovesTheDirectory(t *testi
 		t.Errorf("asides %+v", kp.Asides)
 	}
 }
+
+// The hand verb aside sets the live data aside whole and removes it, naming the streams as a list, and restore-aside puts
+// it back once no live name exists (§516, §554, §566, A-123, A-124).
+func TestAsideMovesTheLiveDataIntoAnAsideAndRestoreAsidePutsItBack(t *testing.T) {
+	r := newRig(t)
+	ans := r.do(recovery.Act{Kind: recovery.KindAside, Module: "app", Kept: "notes", Why: "look at it", Caller: "tools", Asker: "op"})
+	ev := r.s.named(seat.EventSetAside)
+	if ans.Accepted == "" || len(ev) != 1 {
+		t.Fatalf("answer %+v events %+v", ans, r.s.events)
+	}
+	sa := ev[0].Body.(seat.SetAsideEvent)
+	if sa.Act != ans.Accepted || len(sa.Names) != 2 || sa.Size == 0 || len(r.b.streams) != 0 {
+		t.Errorf("set-aside %+v streams %v", sa, r.b.streams)
+	}
+	if got := r.e.Unrestored(); len(got) != 1 {
+		t.Errorf("unrestored %+v", got)
+	}
+	r.s.events = nil
+	r.do(recovery.Act{Kind: recovery.KindRestoreAside, Module: "app", Kept: "notes", AsideID: sa.ID, Why: "done looking", Caller: "tools"})
+	if lastRestored(t, r).Outcome != "done" || r.b.streams["app_notes"] != "hello" || len(r.e.Unrestored()) != 0 {
+		t.Errorf("streams %v", r.b.streams)
+	}
+}